Eliseo Guallar
Eliseo Guallar
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Chair and Professor of the Department of Epidemiology
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Professional overview
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Dr. Guallar is an epidemiologist whose research is focused on the study of cardiovascular disease epidemiology and prevention, with an emphasis on evaluating the role of environmental and nutritional exposures in the development of cardiovascular disease. This research has made critically important and novel contributions to our understanding of risk factors for chronic disease both in the US and globally. He has published seminal articles and is a leading figure in an emerging field highlighting the risks of exposure to levels of metals previously considered safe for cardiovascular health. In addition to his work in toxic metals, Dr. Guallar has made important contributions to understanding the effects of certain micronutrients and vitamin supplements on cardiovascular disease risk and outcomes. Publications in this area were influential in changing consumer habits and attitudes towards these products. Much of this research has been funded by the National Institutes of Health, the Agency for Healthcare Research and Quality, the American Heart Association, the CDC, and other funders.
Dr. Guallar was the founding director of the Center for Clinical Epidemiology at the Samsung Medical Center and a lead investigator of the Kangbuk Samsung Cohort Study at the Kangbuk Samsung Hospital since its inception in 2010. Dr. Guallar has published over 500 research papers in peer-reviewed journals. He is also a Deputy Editor for Methods at the Annals of Internal Medicine and a past member and Chair of the Cancer, Heart, and Sleep Study Section at the National Institutes of Health.
Prior to teaching at NYU, Dr. Guallar was a Professor of Epidemiology and Medicine at the Johns Hopkins University Bloomberg School of Public Health and a core faculty member of the Welch Center for Prevention, Epidemiology, and Clinical Research at Johns Hopkins. In the Department of Epidemiology, Dr. Guallar was the Director of the Environmental and Occupational Area of Concentration and the Co-Director of the PhD Program. Dr. Guallar was also an adjunct Professor at the Department of Clinical Research Design and Evaluation of the Samsung Advanced Institute for Health Science and Technology, Sungkyunkwan University, in Seoul, Korea.
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Education
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Diploma of English, Spanish Official School of Languages at Zaragoza (Escuela Oficial de Idiomas de Zaragoza), Zaragoza, SpainMD, University of Zaragoza, Zaragoza, SpainMPH, University of Minnesota, Minneapolis, MNDrPH, Harvard University, Boston, MA
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Honors and awards
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Six Honor Calls in the MD Program, University of Zaragoza School of Medicine (1981)Fellow of Spain’s Program of Training of Graduate Research of the Ministry of Education and Science, University of Zaragoza (1988)Fulbright Scholar, sponsored by Spain’s Ministry of Health and Consumer Affairs (1989)Faculty Innovation Award, Johns Hopkins University Bloomberg School of Public Health (2001)Scientist Development Award, American Heart Association (2002)Fellow of the American Heart Association, Council on Epidemiology and Prevention (2013)Advising, Mentoring, and Teaching Recognition Award 2014 – 2015, Johns Hopkins University Bloomberg School of Public Health (2015)High Impact Research Icon, University of Malaya (2015)
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Publications
Publications
Cadmium exposure and incident peripheral arterial disease
AbstractTellez-Plaza, M., Guallar, E., Fabsitz, R. R., Howard, B. V., Umans, J. G., Francesconi, K. A., Goessler, W., Devereux, R. B., & Navas-Acien, A. (n.d.).Publication year
2013Journal title
Circulation: Cardiovascular Quality and OutcomesVolume
6Issue
6Page(s)
626-633AbstractBackground-Cadmium has been associated with peripheral arterial disease (PAD) in cross-sectional studies, but prospective evidence is lacking. Our goal was to evaluate the association of urine cadmium concentrations with incident PAD in a large population-based cohort. Methods and Results-A prospective cohort study was performed with 2864 adult American Indians 45 to 74 years of age from Arizona, Oklahoma, and North and South Dakota who participated in the Strong Heart Study from 1989 to 1991 and were followed through 2 follow-up examination visits in 1993 to 1995 and 1997 to 1999. Participants were free of PAD, defined as an ankle brachial index lt;0.9 or >1.4 at baseline, and had complete baseline information on urine cadmium, potential confounders, and ankle brachial index determinations in the follow-up examinations. Urine cadmium was measured using inductively coupled plasma mass spectrometry and corrected for urinary dilution by normalization to urine creatinine. Multivariable-adjusted hazard ratios were computed using Cox-proportional hazards models for interval-censored data. A total of 470 cases of incident PAD, defined as an ankle brachial index <0.9 or >1.4, were identified. After adjustment for cardiovascular disease risk factors including smoking status and pack-years, the hazard ratio comparing the 80th to the 20th percentile of urine cadmium concentrations was 1.41 (1.05-1.81). The hazard ratio comparing the highest to the lowest tertile was 1.96 (1.32-2.81). The association persisted after excluding participants with ankle brachial index >1.4 only as well as in subgroups defined by sex and smoking status. Conclusions-Urine cadmium, a biomarker of long-term cadmium exposure, was independently associated with incident PAD, providing further support for cadmium as a cardiovascular disease risk factor.Closing in on the truth about recombinant human bone morphogenetic protein-2: Evidence synthesis, data sharing, peer review, and reproducible research
Laine, C., Guallar, E., Mulrow, C., Taichman, D. B., Cornell, J. E., Cotton, D., Griswold, M. E., Russell Localio, A., Meibohm, A. R., Stack, C. B., Williams, S. V., & Goodman, S. N. (n.d.).Publication year
2013Journal title
Annals of internal medicineVolume
158Issue
12Page(s)
916-918Delay to curative surgery greater than 12 weeks is associated with increased mortality in patients with colorectal and breast cancer but not lung or thyroid cancer
AbstractShin, D. W., Cho, J., Kim, S. Y., Guallar, E., Hwang, S. S., Cho, B., Oh, J. H., Jung, K. W., Seo, H. G., & Park, J. H. (n.d.).Publication year
2013Journal title
Annals of Surgical OncologyVolume
20Issue
8Page(s)
2468-2476AbstractBackground: Surgery for cancer is often delayed due to variety of patient-, provider-, and health system-related factors. However, impact of delayed surgery is not clear, and may vary among cancer types. We aimed to determine the impact of the delay from cancer diagnosis to potentially curative surgery on survival. Methods: Cohort study based on representative sample of patients (n = 7,529) with colorectal, breast, lung and thyroid cancer with local or regional disease who underwent potentially curative surgery as their first therapeutic modality within 1 year of cancer diagnosis. They were diagnosed in 2006 and followed for mortality until April 2011, a median follow-up of 4.7 years. Results: For colorectal and breast cancers, the adjusted hazard ratios (95 % confidence intervals) for all-cause mortality comparing a surgical delay beyond 12 weeks to performing surgery within weeks 1-4 after diagnosis were 2.65 (1.50-4.70) and 1.91 (1.06-3.49), respectively. No clear pattern of increased risk was observed with delays between 4 and 12 weeks, or for any delay in lung and thyroid cancers. Concordance between the area of the patient's residence and the hospital performing surgery, and the patient's income status were associated with delayed surgery. Conclusions: Delays to curative surgery beyond 12 weeks were associated with increased mortality in colorectal and breast cancers, suggesting that health provision services should be organized to avoid unnecessary treatment delays. Health care systems should also aim to reduce socioeconomic and geographic disparities and to guarantee equitable access to high quality cancer care.Dynamic analysis of cardiac rhythms for discriminating atrial fibrillation from lethal ventricular arrhythmias
AbstractDe Mazumder, D., Lake, D. E., Cheng, A., Moss, T. J., Guallar, E., Weiss, R. G., Jones, S. R., Tomaselli, G. F., & Moorman, J. R. (n.d.).Publication year
2013Journal title
Circulation: Arrhythmia and ElectrophysiologyVolume
6Issue
3Page(s)
555-561AbstractBackground-Implantable cardioverter-defibrillators (ICDs), the first line of therapy for preventing sudden cardiac death in high-risk patients, deliver appropriate shocks for termination of ventricular tachycardia (VT)/ventricular fibrillation. A common shortcoming of ICDs is imperfect rhythm discrimination, resulting in the delivery of inappropriate shocks for atrial fibrillation (AF). An underexplored area for rhythm discrimination is the difference in dynamic properties between AF and VT/ventricular fibrillation. We hypothesized that the higher entropy of rapid cardiac rhythms preceding ICD shocks distinguishes AF from VT/ventricular fibrillation. Methods and Results-In a multicenter, prospective, observational study of patients with primary prevention ICDs, 119 patients received shocks from ICDs with stored, retrievable intracardiac electrograms. Blinded adjudication revealed shocks were delivered for VT/ventricular fibrillation (62%), AF (23%), and supraventricular tachycardia (15%). Entropy estimation of only 9 ventricular intervals before ICD shocks accurately distinguished AF (receiver operating characteristic curve area, 0.98; 95% confidence intervals, 0.93-1.0) and outperformed contemporary ICD rhythm discrimination algorithms. Conclusions-This new strategy for AF discrimination based on entropy estimation expands on simpler concepts of variability, performs well at fast heart rates, and has potential for broad clinical application.EGFR Mutation Testing in Patients with Advanced Non-Small Cell Lung Cancer: A Comprehensive Evaluation of Real-World Practice in an East Asian Tertiary Hospital
AbstractChoi, Y. L., Sun, J. M., Cho, J., Rampal, S., Han, J., Parasuraman, B., Guallar, E., Lee, G., Lee, J., & Shim, Y. M. (n.d.).Publication year
2013Journal title
PloS oneVolume
8Issue
2AbstractIntroduction: Guidelines for management of non-small cell lung cancer (NSCLC) strongly recommend EGFR mutation testing. These recommendations are particularly relevant in Asians that have higher EGFR mutation prevalence. This study aims to explore current testing practices, logistics of testing, types of EGFR mutation, and prevalence of EGFR mutations in patients with advanced NSCLC in a large comprehensive cancer center in Korea. Methods: Our retrospective cohort included 1,503 NSCLC patients aged ≥18 years, with stage IIIB/IV disease, who attended the Samsung Medical Center in Seoul, Korea, from January 2007 through July 2010. Trained oncology nurses reviewed and abstracted data from electronic medical records. Results: This cohort had a mean age (SD) of 59.6 (11.1) years, 62.7% were males, and 52.9% never-smokers. The most common NSCLC histological types were adenocarcinoma (70.5%) and squamous cell carcinoma (18.0%). Overall, 39.5% of patients were tested for EGFR mutations. The proportion of patients undergoing EGFR testing during January 2007 through July 2008, August 2008 through September 2009, and October 2009 through July 2010 were 23.3%, 38.3%, and 63.5%, respectively (P<0.001). The median time elapsed between cancer diagnoses and receiving EGFR testing results was 21 days. EGFR testing was most frequently ordered by oncologists (57.7%), pulmonologists (31.9%), and thoracic surgeons (6.6%). EGFR testing was more commonly requested for women, younger patients, stage IV disease, non-smokers, and adenocarcinoma histology. Of 586 cases successfully tested for EGFR mutations, 209 (35.7%) were positive, including 118 cases with exon 19 deletions and 62 with L858R mutations. EGFR mutation positive patients were more likely to be female, never-smokers, never-drinkers and to have adenocarcinoma. Conclusions: In a large cancer center in Korea, the proportion of EGFR testing increased from 2007 through 2010. The high frequency of EGFR mutation positive cases warrants the need for generalized testing in Asian NSCLC patients.Fasting glucose level and the risk of incident atherosclerotic cardiovascular diseases
AbstractPark, C., Guallar, E., Linton, J. A., Lee, D. C., Jang, Y., Son, D. K., Han, E. J., Baek, S. J., Yun, Y. D., Jee, S. H., & Samet, J. M. (n.d.).Publication year
2013Journal title
Diabetes CareVolume
36Issue
7Page(s)
1988-1993AbstractObjective-Although diabetes increases the risk of cardiovascular disease (CVD) and mortality, the dose-response relationship between fasting glucose levels below those diagnostic of diabetes with cardiovascular events has not been well characterized. Research design and methods-A prospective cohort study of more than one million Koreans was conducted with a mean follow-up of 16 years. A total of 1,197,384 Korean adults with no specific medical conditions diagnosed were classified by baseline fasting serum glucose level. Associations of fasting glucose level with CVD incidence and mortality, stroke incidence and mortality, and all-cause mortality were analyzed using multivariate proportional hazards regression. ResultsThe relationships between fasting glucose levels and CVD risks generally followed J-shape curves, with lowest risk in the glucose range of 85-99 mg/dL. As fasting glucose levels increased to .100 mg/dL, risks for CVD, ischemic heart disease, myocardial infarction, and thrombotic stroke progressively increased, but risk for hemorrhagic stroke did not. Fasting glucose levels ,70 mg/dL were associated with increased risk of all stroke (hazard ratio 1.06, 95% CI 1.01-1.11) in men and (hazard ratio 1.11, 1.05-1.17) in women. Conclusions-Both low glucose level and impaired fasting glucose should be considered as predictors of risk for stroke and coronary heart disease. The fasting glucose level associated with the lowest cardiovascular risk may be in a narrow range.Guideline-concordant antipsychotic use and mortality in schizophrenia
AbstractCullen, B. A., Mcginty, E. E., Zhang, Y., Dosreis, S. C., Steinwachs, D. M., Guallar, E., & Daumit, G. L. (n.d.).Publication year
2013Journal title
Schizophrenia bulletinVolume
39Issue
5Page(s)
1159-1168AbstractObjective: To determine if care concordant with 2009 Schizophrenia Patient Outcomes Research Team (PORT) pharmacological recommendations for schizophrenia is associated with decreased mortality. Methods: We conducted a retrospective cohort study of adult Maryland Medicaid beneficiaries with schizophrenia and any antipsychotic use from 1994 to 2004 (N = 2132). We used Medicaid pharmacy data to measure annual and average antipsychotic continuity, to calculate chlorpromazine (CPZ) dosing equivalents, and to examine anti-Parkinson medication use. Cox proportional hazards regression models were used to examine the relationship between antipsychotic continuity, antipsychotic dosing, and anti-Parkinson medication use and mortality. Results: Annual antipsychotic continuity was associated with decreased mortality. Among patients with annual continuity greater than or equal to 90%, the hazard ratio [HR] for mortality was 0.75 (95% confidence interval [CI] 0.57-0.99) compared with patients with annual medication possession ratios (MPRs) of less than 10%. The HRs for mortality associated with continuous annual and average antipsychotic continuity were 0.75 (95% CI 0.58-0.98) and 0.84 (95% CI 0.58-1.21), respectively. Among users of first-generation antipsychotics, doses greater than or equal to 1500 CPZ dosing equivalents were associated with increased risk of mortality (HR 1.88, 95% CI 1.10-3.21), and use of anti-Parkinson medication was associated with decreased risk of mortality (HR 0.72, 95% CI 0.55-0.95). Mental health visits were also associated with decreased mortality (HR 0.96, 95% CI 0.93-0.98). Conclusions: Adherence to PORT pharmacological guidelines is associated with reduced mortality among patients with schizophrenia. Adoption of outcomes monitoring systems and innovative service delivery programs to improve adherence to the PORT guidelines should be considered.Heritability and preliminary genome-wide linkage analysis of arsenic metabolites in urine
AbstractTellez-Plaza, M., Gribble, M. O., Saroja Voruganti, V., Francesconi, K. A., Goessler, W., Umans, J. G., Silbergeld, E. K., Guallar, E., Franceschini, N., North, K. E., Kao, W. H., MacCluer, J. W., Cole, S. A., & Navas-Acien, A. (n.d.).Publication year
2013Journal title
Environmental health perspectivesVolume
121Issue
3Page(s)
345-351AbstractBackground: Arsenic (III) methyltransferase (AS3MT) has been related to urine arsenic metabolites in association studies. Other genes might also play roles in arsenic metabolism and excretion. Objective: We evaluated genetic determinants of urine arsenic metabolites in American Indian adults from the Strong Heart Study (SHS). Methods: We evaluated heritability of urine arsenic metabolites [percent inorganic arsenic (%iAs), percent monomethylarsonate (%MMA), and percent dimethylarsinate (%DMA)] in 2,907 SHS participants with urine arsenic measurements and at least one relative within the cohort. We conducted a preliminary linkage analysis in a subset of 487 participants with available genotypes on approximately 400 short tandem repeat markers using a general pedigree variance component approach for localizing quantitative trait loci (QTL). Results: The medians (interquartile ranges) for %iAs, %MMA, and %DMA were 7.7% (5.4-10.7%), 13.6% (10.5-17.1%), and 78.4% (72.5-83.1%), respectively. The estimated heritability was 53% for %iAs, 50% for %MMA, and 59% for %DMA. After adjustment for sex, age, smoking, body mass index, alcohol consumption, region, and total urine arsenic concentrations, LOD [logarithm (to the base of 10) of the odds] scores indicated suggestive evidence for genetic linkage with QTLs influencing urine arsenic metabolites on chromosomes 5 (LOD = 2.03 for %iAs), 9 (LOD = 2.05 for %iAs and 2.10 for %MMA), and 11 (LOD = 1.94 for %iAs). A peak for %DMA on chromosome 10 within 2 Mb of AS3MT had an LOD of 1.80. Conclusions: This population-based family study in American Indian communities supports a genetic contribution to variation in the distribution of arsenic metabolites in urine and, potentially, the involvement of genes other than AS3MT.Heritability of myopia and ocular biometrics in Koreans: the healthy twin study.
AbstractKim, M. H., Zhao, D., Kim, W., Lim, D. H., Song, Y. M., Guallar, E., Cho, J., Sung, J., Chung, E. S., & Chung, T. Y. (n.d.).Publication year
2013Journal title
Unknown JournalVolume
54Issue
5Page(s)
3644-3649AbstractTo estimate the heritabilities of myopia and ocular biometrics among different family types among a Korean population. We studied 1508 adults in the Healthy Twin Study. Spherical equivalent, axial length, anterior chamber depth, and corneal astigmatism were measured by refraction, corneal topography, and A-scan ultrasonography. To see the degree of resemblance among different types of family relationships, intraclass correlation coefficients (ICC) were calculated. Variance-component methods were applied to estimate the genetic contributions to eye phenotypes as heritability based on the maximum likelihood estimation. Narrow sense heritability was calculated as the proportion of the total phenotypic variance explained by additive genetic effects, and linear and nonlinear effects of age, sex, and interactions between age and sex were adjusted. A total of 240 monozygotic twin pairs, 45 dizygotic twin pairs, and 938 singleton adult family members who were first-degree relatives of twins in 345 families were included in the study. ICCs for spherical equivalent from monozygotic twins, pooled first-degree pairs, and spouse pairs were 0.83, 0.34, and 0.20, respectively. The ICCs of other ocular biometrics were also significantly higher in monozygotic twins compared with other relative pairs, with greater consistency and conformity. The estimated narrow sense heritability (95% confidence interval) was 0.78 (0.71-0.84) for spherical equivalent; 0.86 (0.82-0.90) for axial length; 0.83 (0.76-0.91) for anterior chamber depth; and 0.70 (0.63-0.77) for corneal astigmatism. The estimated heritability of spherical equivalent and ocular biometrics in the Korean population suggests the compelling evidence that all traits are highly heritable.Lactate and Risk of Incident Diabetes in a Case-Cohort of the Atherosclerosis Risk in Communities (ARIC) Study
AbstractJuraschek, S. P., Shantha, G. P. S., Chu, A. Y., Miller, E. R., Guallar, E., Hoogeveen, R. C., Ballantyne, C. M., Brancati, F. L., Schmidt, M. I., Pankow, J. S., & Young, J. H. (n.d.).Publication year
2013Journal title
PloS oneVolume
8Issue
1AbstractBackground: Oxidative capacity is decreased in type 2 diabetes. Whether decreased oxidative capacity is a cause or consequence of diabetes is unknown. Our purpose is to evaluate whether lactate, a marker of oxidative capacity, is associated with incident diabetes. Methods and Findings: We conducted a case-cohort study in the Atherosclerosis Risk in Communities (ARIC) study at year 9 of follow-up. We evaluated lactate's association with diabetes risk factors at baseline and estimated the hazard ratio for incident diabetes by quartiles of plasma lactate in 544 incident diabetic cases and 533 non-cases. Plasma lactate showed a graded positive relationship with fasting glucose and insulin (P<0.001). The relative hazard for incident diabetes increased across lactate quartiles (P-trend ≤0.001). Following adjustment for demographic factors, medical history, physical activity, adiposity, and serum lipids, the hazard ratio in the highest quartile was 2.05 times the hazard in the lowest quartile (95% CI: 1.28, 3.28). After including fasting glucose and insulin the association became non-significant. Conclusions: Lactate, an indicator of oxidative capacity, predicts incident diabetes independent of many other risk factors and is strongly related to markers of insulin resistance. Future studies should evaluate the temporal relationship between elevated lactate and impaired fasting glucose and insulin resistance.Letter and reply: Reply
Spector, J. T., Navas-Acien, A., Fadrowski, J., Guallar, E., Jaar, B., & Weaver, V. (n.d.). In Nephrology Dialysis Transplantation (1–).Publication year
2013Volume
28Issue
8Page(s)
e8-e9Letter to the editor
Tellez-Plaza, M., Guallar, E., Howard, B. V., & Navas-Acien, A. (n.d.). In Epidemiology (1–).Publication year
2013Volume
24Issue
5Page(s)
784-785Mercury exposure in young adulthood and incidence of diabetes later in life: The CARDIA trace element study
AbstractHe, K., Xun, P., Liu, K., Morris, S., Reis, J., & Guallar, E. (n.d.).Publication year
2013Journal title
Diabetes CareVolume
36Issue
6Page(s)
1584-1589AbstractOBJECTIVE - Laboratory studies suggest that exposure to methylmercury at a level similar to those found in fish may induce pancreatic islet β-cell dysfunction. Few, if any, human studies have examined the association between mercury exposure and diabetes incidence. We examined whether toenail mercury levels are associated with incidence of diabetes in a large prospective cohort. RESEACH DESIGN AND METHODS - A prospective cohort of 3,875 American young adults, aged 20-32 years, free of diabetes in 1987 (baseline), were enrolled and followed six times until 2005. Baseline toenail mercury levels were measured with instrumental neutron-activation analysis. Incident diabetes was identified by plasma glucose levels, oral glucose tolerance tests, hemoglobin A1C levels, and/or antidiabetes medications. RESULTS - A total of 288 incident cases of diabetes occurred over 18 years of follow-up. In multivariate analyses adjusted for age, sex, ethnicity, study center, education, smoking status, alcohol consumption, physical activity, family history of diabetes, intakes of long-chain n-3 fatty acids and magnesium, and toenail selenium, toenail mercury levels were positively associated with the incidence of diabetes. The hazard ratio (95% CI) of incident diabetes compared the highest to the lowest quintiles of mercury exposure was 1.65 (1.07 -2.56; P for trend = 0.02). Higher mercury exposure at baseline was also significantly associated with decreased homeostasis model assessment of β-cell function index (P for trend < 0.01). CONCLUSIONS - Our results are consistent with findings from laboratory studies and provide longitudinal human data suggesting that people with high mercury exposure in young adulthood may have elevated risk of diabetes later in life.Meta-analysis: Vitamin D and non-alcoholic fatty liver disease
AbstractEliades, M., Spyrou, E., Agrawal, N., Lazo, M., Brancati, F. L., Potter, J. J., Koteish, A. A., Clark, J. M., Guallar, E., & Hernaez, R. (n.d.).Publication year
2013Journal title
Alimentary Pharmacology and TherapeuticsVolume
38Issue
3Page(s)
246-254AbstractBackground Non-alcoholic fatty liver disease (NAFLD) is a highly prevalent condition. Emerging evidence suggests that vitamin D may play a role in the pathogenesis of NAFLD. Aim To review systematically the association between vitamin D levels, measured as serum 25-hydroxy vitamin D [25(OH)D], and NAFLD. Methods We used PubMed and EMBASE databases to identify all studies that assessed the association between vitamin D and NAFLD up until 22 April 2013, without language restrictions. We included studies that compared vitamin D levels between NAFLD cases and controls and also those that compared the odds of vitamin D deficiency by NAFLD status. Pooled standardised differences and odds ratios were calculated using an inverse variance method. Results Seventeen cross-sectional and case-control studies have evaluated the association between vitamin D and NAFLD. NAFLD was diagnosed using biopsy (4 studies), ultrasound or CT (10 studies) and liver enzymes (3 studies). Nine studies provided data for a quantitative meta-analysis. Compared to controls, NAFLD patients had 0.36 ng/mL (95% CI: 0.32, 0.40 ng/mL) lower levels of 25(OH)D and were 1.26 times more likely to be vitamin D deficient (OR 1.26, 95% CI: 1.17, 1.35). Conclusions NAFLD patients have decreased serum 25(OH)D concentrations, suggesting that vitamin D may play a role in the development of NAFLD. The directionality of this association cannot be determined from cross-sectional studies. Demonstration of a causal role of hypovitaminosis D in NAFLD development in future studies could have important therapeutic implications.Past history of skin infection and risk of surgical site infection after elective surgery
AbstractFaraday, N., Rock, P., Lin, E. E., Perl, T. M., Carroll, K., Stierer, T., Robarts, P., McFillin, A., Ross, T., Shah, A. S., Riley, L. H., Tamargo, R. J., Black, J. H., Blasco-Colmenares, E., & Guallar, E. (n.d.).Publication year
2013Journal title
Annals of SurgeryVolume
257Issue
1Page(s)
150-154AbstractOBJECTIVE: To identify baseline patient characteristics associated with increased susceptibility to surgical site infection (SSI) after elective surgery. BACKGROUND: The Center for Medicare and Medicaid Services considers SSI to be preventable through adherence to current infection control practices; however, the etiology of wound infection is incompletely understood. METHODS: Prospective cohort study involving patients undergoing cardiac, vascular, craniotomy, and spinal surgery at 2 academic medical centers in Baltimore, MD. A comprehensive medical history was obtained at baseline, and participants were followed for 6 months using active inpatient and outpatient surveillance for deep SSI and infectious death. Infection control best practices were monitored perioperatively. The relative risk of SSI/infectious death was determined comparing those with versus those without a past medical history of skin infection using Cox proportional hazards models. RESULTS: Of 613 patients (mean [SD] = 62.3 [11.5] years; 42.1% women), 22.0% reported a history of skin infection. The cumulative incidence of deep SSI/infectious death was 6.7% versus 3.1% for those with and without a history of skin infection, respectively (unadjusted hazard ratio (HR) = 2.25; 95% confidence interval (95% CI), 0.98-5.14; P = 0.055). Risk estimates increased after adjustments for demographic and socioeconomic variables (HR = 2.82; 95% CI, 1.18-6.74; P = 0.019) and after propensity score adjustment for all potential confounders (HR = 3.41; 95% CI, 1.36-8.59; P = 0.009). Adjustments for intraoperative infection risk factors and adherence to infection control best practice metrics had no impact on risk estimates. CONCLUSIONS: A history of skin infection identified a state of enhanced susceptibility to SSI at baseline that is independent of traditional SSI risk factors and adherence to current infection control practices.Postmenopausal hormone therapy: The heart of the matter
Guallar, E., Manson, J. E., Laine, C., & Mulrow, C. (n.d.).Publication year
2013Journal title
Annals of internal medicineVolume
158Issue
1Page(s)
69-70Prevalence of nonalcoholic fatty liver disease in the United States: The third national health and nutrition examination survey, 1988-1994
AbstractLazo, M., Hernaez, R., Eberhardt, M. S., Bonekamp, S., Kamel, I., Guallar, E., Koteish, A., Brancati, F. L., & Clark, J. M. (n.d.).Publication year
2013Journal title
American Journal of EpidemiologyVolume
178Issue
1Page(s)
38-45AbstractPrevious estimates of the prevalence of nonalcoholic fatty liver disease (NAFLD) in the US population relied on measures of liver enzymes, potentially underestimating the burden of this disease. We used ultrasonography data from 12,454 adults who participated in the Third National Health and Nutrition Examination Survey, conducted in the United States from 1988 to 1994. We defined NAFLD as the presence of hepatic steatosis on ultrasonography in the absence of elevated alcohol consumption. In the US population, the rates of prevalence of hepatic steatosis and NAFLD were 21.4% and 19.0%, respectively, corresponding to estimates of 32.5 (95% confidence interval: 29.9, 35.0) million adults with hepatic steatosis and 28.8 (95% confidence interval: 26.6, 31.2) million adults with NAFLD nationwide. After adjustment for age, income, education, body mass index (weight (kg)/height (m)2), and diabetes status, NAFLD was more common in Mexican Americans (24.1%) compared with non-Hispanic whites (17.8%) and non-Hispanic blacks (13.5%) (P = 0.001) and in men (20.2%) compared with women (15.8%) (P < 0.001). Hepatic steatosis and NAFLD were also independently associated with diabetes, with insulin resistance among people without diabetes, with dyslipidemia, and with obesity. Our results extend previous national estimates of the prevalence of NAFLD in the US population and highlight the burden of this disease. Men, Mexican Americans, and people with diabetes and obesity are the most affected groups.Prospective observational study of implantable cardioverter-defibrillators in primary prevention of sudden cardiac death: study design and cohort description.
AbstractCheng, A., Dalal, D., Butcher, B., Norgard, S., Zhang, Y., Dickfeld, T., Eldadah, Z. A., Ellenbogen, K. A., Guallar, E., & Tomaselli, G. F. (n.d.).Publication year
2013Journal title
Unknown JournalVolume
2Issue
1Page(s)
e000083AbstractPrimary-prevention implantable cardioverter-defibrillators (ICDs) reduce total mortality in patients with severe left ventricular systolic function. However, only a minority of patients benefit from these devices. We designed the Prospective Observational Study of Implantable Cardioverter-Defibrillators (PROSE-ICD) to identify risk factors and enhance our understanding of the biological mechanisms that predispose to arrhythmic death in patients undergoing ICD implantation for primary prevention of sudden death. This is a multicenter prospective cohort study with a target enrollment of 1200 patients. The primary end point is ICD shocks for adjudicated ventricular tachyarrhythmias. The secondary end point is total mortality. All patients undergo a comprehensive evaluation including history and physical examination, signal-averaged electrocardiograms, and blood sampling for genomic, proteomic, and metabolomic analyses. Patients are evaluated every 6 months and after every known ICD shock for additional electrocardiographic and blood sampling. As of December 2011, a total of 1177 patients have been enrolled with more nonwhite and female patients compared to previous randomized trials. A total of 143 patients have reached the primary end point, whereas a total of 260 patients died over an average follow-up of 59 months. The PROSE-ICD study represents a real-world cohort of individuals with systolic heart failure receiving primary-prevention ICDs. Extensive electrophysiological and structural phenotyping as well as the availability of serial DNA and serum samples will be important resources for evaluating novel metrics for risk stratification and identifying patients at risk for arrhythmic sudden death. URL: http://clinicaltrials.gov/ Unique Identifier: NCT00733590.Prospective study of serum adiponectin and incident metabolic syndrome: The ARIRANG study
AbstractKim, J. Y., Ahn, S. V., Yoon, J. H., Koh, S. B., Yoon, J., Yoo, B. S., Lee, S. H., Park, J. K., Choe, K. H., & Guallar, E. (n.d.).Publication year
2013Journal title
Diabetes CareVolume
36Issue
6Page(s)
1547-1553AbstractOBJECTIVE - Increased adiponectin levels may play a protective role in the development of metabolic abnormalities, but prospective studies of the predictive value of serum adiponectin to identify individuals at high risk of new-onset metabolic syndrome are lacking. We investigated whether serum adiponectin predicts incident cases of the metabolic syndrome in a populationbased longitudinal study. RESEARCH DESIGN ANDMETHODS - A prospective cohort study was conducted of 2,044 adults (831 men and 1,213 women) aged 40-70 years without metabolic syndrome examined in 2005-2008 (baseline) and 2008 - 2011 (follow-up). Baseline serum adiponectin concentrations were measured by radioimmunoassay. RESULTS - During an average of 2.6 years of follow-up, 153 men (18.4%) and 199 women (16.4%) developed metabolic syndrome. In multivariable-adjusted models, the odds ratio for incident metabolic syndrome comparing the highest with the lowest quartiles of adiponectin levels was 0.25 (95% CI 0.14-0.47) in men and 0.45 (0.28-0.74) in women. While serum adiponectin did not improve the area under the ROC curve for predicting new-onset metabolic syndrome based on information from metabolic syndrome components, the net reclassification improvement and the integrated discrimination improvement of prediction models including adiponectin were significantly higher compared with those of models not including adiponectin among men, with a signi ficant difference between men and women (P = 0.001). CONCLUSIONS - Increased adiponectin is an independent protective factor for incident metabolic syndrome in men and women, and it may have a clinical role in predicting new-onset metabolic syndrome among men.Public attitudes toward cancer and cancer patients: A national survey in Korea
AbstractCho, J., Smith, K., Choi, E. K., Kim, I. R., Chang, Y. J., Park, H. Y., Guallar, E., & Shim, Y. M. (n.d.).Publication year
2013Journal title
Psycho-OncologyVolume
22Issue
3Page(s)
605-613AbstractBackground Regardless of improved survival rate, negative images and myths about cancer still abound. Cancer stigma may reduce patients' life opportunities resulting in social isolation, decreased level of emotional well-being, and poor health outcomes. This study was aimed to evaluate public attitudes toward cancer and cancer patients and people's willingness to disclose cancer diagnosis in South Korea. Methods A cross-sectional survey was conducted in August and September 2009. A nationally representative sample of 1011 men and women with no history of cancer was recruited. A set of 12 questions grouped into three domains (impossibility of recovery, cancer stereotypes, and discrimination) was used to assess public attitudes toward cancer. Results It was found 58.5% of study participants agreed that it is impossible to treat cancer regardless of highly developed medical science, 71.8% agreed that cancer patients would not be able to make contributions to society, and 23.5% agreed that they would avoid working with persons who have cancer. The proportions of people who said that that they would not disclose a cancer diagnosis to family, friends or neighbors, or coworkers were 30.2%, 47.0%, and 50.7%, respectively. Negative attitudes toward cancer were strongly associated with lower willingness to disclose a cancer diagnosis. Conclusions Negative attitudes, stereotypes, and discriminating attitudes toward cancer and people affected by the disease were very common in spite of clinical progress and improved survivorship. Impact Our findings emphasize the need for health policy and social changes to provide a more supportive environment for cancer survivors.Racial patterns of cardiovascular disease risk factors in serious mental illness and the overall U.S. population
AbstractKeenan, T. E., Yu, A., Cooper, L. A., Appel, L. J., Guallar, E., Gennusa, J. V., Dickerson, F. B., Crum, R. M., Anderson, C. A., Campbell, L. M., Young, D. R., & Daumit, G. L. (n.d.).Publication year
2013Journal title
Schizophrenia ResearchVolume
150Issue
1Page(s)
211-216AbstractBackground: Serious mental illness (SMI) and minority race are each associated with elevated cardiovascular disease (CVD) mortality. However, little is known about racial variation in CVD risk factors in individuals with SMI. This study aimed to determine racial patterns of CVD risk factors in individuals with SMI and to compare these patterns to those of the general population. Methods: Overweight/obese adults with SMI (163 whites; 111 African Americans) examined from 2008 to 2011 during a weight loss trial were compared at study baseline to overweight/obese adults (1103 whites; 550 African Americans) of similar age, sex, and race in the 2007 to 2010 National Health and Nutrition Examination Survey. Results: All CVD risk factors except cholesterol were higher in SMI than the overall U.S. population. After adjusting for age and sex, both racial groups with SMI had similarly high risks of smoking, obesity, diabetes, and hypertension, while African Americans with SMI had lower risks of high cholesterol (RR 0.73; 95% CI 0.57-0.94) and metabolic syndrome (RR 0.75; 95% CI 0.63-0.91) than whites with SMI. In the U.S. population sample, African Americans compared to whites had higher risks of obesity (RR 1.23; 95% CI 1.14-1.34), diabetes (RR 1.68; 95% CI 1.21-2.34), and hypertension (RR 1.44; 95% CI 1.31-1.60) but no significant difference in smoking, high cholesterol, and metabolic syndrome. Conclusions: Compared to the general population, the greater burden and dissimilar racial pattern of CVD risk factors in SMI underscore the need for CVD prevention programs targeting the SMI population.Real world impact of epidermal growth factor receptor mutation status on treatment patterns in patients with non-small cell lung cancer
AbstractSun, J. M., Rampal, S., Lee, G., Lee, J., Choi, Y. L., Parasuraman, B., Guallar, E., Cho, J., & Shim, Y. M. (n.d.).Publication year
2013Journal title
Lung CancerVolume
80Issue
2Page(s)
191-196AbstractBackground: Epidermal growth factor receptor (EGFR) mutation status is an important predictor of the efficacy of EGFR tyrosine kinase inhibitor (TKI) therapy in patients with non-small cell lung cancer (NSCLC). We evaluated the real impact of EGFR mutation status on chemotherapy patterns of NSCLC patients. Patients and methods: This is a retrospective cohort study of consecutive advanced NSCLC patients attended at the Samsung Medical Centre in Seoul, Korea, from January 2007 through July 2010. EGFR mutation was analyzed by direct sequencing testing. Results: Among 1164 patients treated during the study period, 166 (14.3%) were EGFR mutation positive, 275 (23.6%) were mutation negative, and 723 (62.1%) had mutation status unknown. Overall, 605 (52%) received TKI therapy as a first-, second-, or third-line therapy. The proportions of patients receiving TKI therapy among those with positive, negative and unknown EGFR mutation status were 88.0, 46.5, and 45.8%, respectively. After adjustment for other factors, patients with a positive EGFR mutation status (odds ratio [OR] 7.88, 95% CI 4.58, 13.57), and those who were female (OR 2.83, 95% CI 2.04, 3.92) or had poor performance status (OR 1.58, 95% CI 1.13, 2.22) were significantly more likely to receive TKI treatment. Furthermore, the temporal relationship between EGFR mutation reporting and initiation of TKI therapy significantly differed by EGFR mutation status. Conclusion: EGFR mutation status significantly affected the chemotherapy patterns in advanced NSCLC. More widespread EGFR testing and the use of faster and more sensitive mutation tests will result in more timely and appropriate use of TKI therapy in advanced NSCLC.Selenium and hypertension: Do we need to reconsider selenium supplementation in cancer patients?
Gouni-Berthold, I., Michalke, B., Krone, W., Guallar, E., & Berthold, H. K. (n.d.). In Journal of Hypertension (1–).Publication year
2013Volume
31Issue
5Page(s)
1050-1052Systematic review of three decades of Spanish cardiovascular epidemiology: Improving translation for a future of prevention
AbstractFranco, M., Bilal, U., Guallar, E., Sanz, G., Gómez, A. F., Fuster, V., & Cooper, R. (n.d.).Publication year
2013Journal title
European Journal of Preventive CardiologyVolume
20Issue
4Page(s)
565-576AbstractBackground: In order to improve national cardiovascular disease (CVD) epidemiology and prevention, we systematically reviewed and analyzed the relevant literature produced in the last three decades for Spain. Design: Systematic Review. Methods: We searched for all the articles aiming to monitor CVD clinical endpoints and risk factors in the Spanish general population that were indexed in MEDLINE and EMBASE. Based on international recommendations, we analyzed each article with a three-level scoring system (low to high) for the following criteria: data quality, representativeness and translation of results into preventive interventions. Results: We reviewed 2565 articles, selecting 314 for in-depth analysis. Articles about diet, blood pressure, obesity and smoking represented 53% of all published CVD studies, whereas those about physical activity or psychosocial factors represented only 5%. Low data quality was found in 67% and 60% of the articles about physical activity and smoking, respectively. High data quality was found in 77% and 61% of the articles dedicated to diet and blood pressure, respectively. Representativeness was low for 41%, 31% and 25% of the studies focusing on diet, smoking and diabetes, respectively. Translation of research results into prevention scored lowest of all three criteria, as 41% of all 314 articles scored low. None of the articles on obesity, diabetes, lipids, physical activity or psychosocial factors identified any specific preventive intervention. Conclusion: Future Spanish CVD epidemiology research will benefit from improving not just the quality and representativeness of the data measured, but drastically improving the translation of research results into future preventive interventions. The lack of a translational focus remains the fundamental gap in CVD research.The association between cecal insertion time and colorectal neoplasm detection
AbstractYang, M. H., Cho, J., Rampal, S., Choi, E. K., Choi, Y. H., Lee, J. H., Kim, Y. H., Chang, D. K., Rhee, P. L., Kim, J. J., Guallar, E., Rhee, J. C., & Son, H. J. (n.d.).Publication year
2013Journal title
BMC GastroenterologyVolume
13Issue
1AbstractBackground: Information on the impact of cecal insertion time on colorectal neoplasm detection is limited. Our objective was to determine the association between cecal insertion time and colorectal neoplasm detection rate in colonoscopy screening.Methods: We performed a cross-sectional study of 12,679 consecutive subjects aged 40-79 years undergoing screening colonoscopy in routine health check-ups at the Center for Health Promotion of the Samsung Medical Center from December 2007 to June 2009. Fixed effects logistic regression conditioning on colonoscopist was used to eliminate confounding due to differences in technical ability and other characteristics across colonoscopists.Results: The mean cecal insertion time was 5.9 (SD, 4.4 minutes). We identified 4,249 (33.5%) participants with colorectal neoplasms, of whom 1,956 had small single adenomas (<5 mm), 595 had medium single adenomas (5-9 mm), and 1,699 had multiple adenomas or advanced colorectal neoplasms. The overall rates of colorectal neoplasm detection by quartiles of cecal insertion time were 36.8%, 33.4%, 32.7%, and 31.0%, respectively (p trend <0.001).The odds for small single colorectal adenoma detection was 16% lower (adjusted OR 0.84; 95% CI 0.71 to 0.99) in the fourth compared to the first quartile of insertion time (p trend 0.005). Insertion time was not associated with the detection rate of single adenomas ≥5 mm, multiple adenomas or advanced colorectal neoplasms.Conclusion: Shorter insertion times were associated with increased rates of detection of small colorectal adenomas <5 mm. Cecal insertion time may be clinically relevant as missed small colorectal adenomas may progress to more advanced lesions.