Alex Dahlen

Alexander Dahlen

Alex Dahlen

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Clinical Associate Professor of Biostatistics

Professional overview

Alex Dahlen, PhD joins GPH as Director of the new Collaborative Statistical Core in the Department of Biostatistics. The goal of the Core is to collaborate widely throughout the School, to bring robust statistical methods and thoughtful study design to public health research, and to train the next generation of data scientists and statisticians in team science and applied statistics. Dr. Dahlen has nearly 10 years of experience working in collaborative statistics, across a variety of settings in and out of academia.

In his previous role as senior statistician in the Quantitative Sciences Unit of the Department of Medicine at Stanford University, Dr. Dahlen collaborated with physicians and clinical researchers on all aspects of research, including acting as lead statistician on grant applications and statistical author on numerous published manuscripts. He devotes a large portion of his time to mentoring junior scientists: providing hands-on coding lessons; overseeing analysis; offering study design and methodology tutorials; and lecturing about healthy research practices. Dr. Dahlen received his PhD in the physics of bubbles from Princeton University in 2011.

Education

BA, Theoretical and Mathematical Physics, Harvard University, Cambridge, MA
PhD, Theoretical and Mathematical Physics, Princeton University, Princeton, NJ

Honors and awards

Pathology Health Equity Research Award at Stanford University (2023)

Publications

Implementing adaptive e-learning for newborn care in Tanzania: an observational study of provider engagement and knowledge gains

Dahlen, A., Meaney, P. A., Hokororo, A., Ndosi, H., Dahlen, A., Jacob, T., Mwanga, J. R., Kalabamu, F. S., Joyce, C. L., Mediratta, R., Rozenfeld, B., & others. (n.d.).

Publication year

2024

Journal title

BMJ Open

Volume

14

Issue

2

Page(s)

e077834
Abstract
Abstract
~

Incidence of Pediatric Urinary Tract Infections Before and During the COVID-19 Pandemic

Dahlen, A., Liang, D., Wang, M. E., Dahlen, A., Liao, Y., Saunders, A. C., Coon, E. R., & Schroeder, A. R. (n.d.).

Publication year

2024

Journal title

JAMA network open

Volume

7

Issue

1

Page(s)

e2350061
Abstract
Abstract
Urinary tract infection (UTI) is common in children, but the population incidence is largely unknown. Controversy surrounds the optimal diagnostic criteria and how to balance the risks of undertreatment and overtreatment. Changes in health care use during the COVID-19 pandemic created a natural experiment to examine health care use and UTI diagnosis and outcomes.

Instrument design and characterization of the millimeter Bolometer Array Camera on the Atacama Cosmology Telescope

Dahlen, A., Swetz, D. S., Ade, P. A., Allen, C., Amiri, M., Appel, J. W., Battistelli, E. S., Burger, B., Chervenak, J. A., Dahlen, A. J., Das, S., & others. (n.d.).

Publication year

2008

Volume

7020

Page(s)

84--95
Abstract
Abstract
~

Linear and Nonlinear Rogue Wave Statistics in the Presence of Random Currents

Dahlen, A., Kaplan, L., Ying, L., Dahlen, A., Heller, E., & Zhuang, Z. (n.d.).

Publication year

2011
Abstract
Abstract
~

Medical Student Documentation Practices and Perspectives Following the 2018 CMS Billing Guidelines

Dahlen, A., Farber, O. N., Dahlen, A., & Kumar, A. D. (n.d.).

Publication year

2022

Journal title

Academic Medicine

Volume

97

Issue

9

Page(s)

1256
Abstract
Abstract
~

Odds of observing the multiverse

Dahlen, A., & Dahlen, A. (n.d.).

Publication year

2010

Journal title

Physical Review D

Volume

81

Issue

6

Page(s)

063501
Abstract
Abstract
~

On “nothing” as an infinitely negatively curved spacetime

Dahlen, A., Brown, A. R., & Dahlen, A. (n.d.).

Publication year

2012

Journal title

Physical Review D

Volume

85

Issue

10

Page(s)

104026
Abstract
Abstract
~

Point-of-care lung ultrasound for continuous positive airway pressure discontinuation in preterm infants

Dahlen, A., Myers, F., Dasani, R., Tong, J., Vallandingham-Lee, S., Manipon, C., Dahlen, A., De Luca, D., Singh, Y., Davis, A. S., Chock, V. Y., & Bhombal, S. (n.d.).

Publication year

2024

Journal title

Journal of perinatology : official journal of the California Perinatal Association
Abstract
Abstract
To determine if the lung ultrasound score (LUS) is predictive of successful continuous positive airway pressure (CPAP) discontinuation in preterm neonates born

Populating the whole landscape

Dahlen, A., Brown, A. R., & Dahlen, A. (n.d.).

Publication year

2011

Journal title

Physical review letters

Volume

107

Issue

17

Page(s)

171301
Abstract
Abstract
~

Prescribing Patterns of Nonrecommended Medications for Children With Acute COVID-19

Dahlen, A., Burns, J. E., Dahlen, A., Bio, L. L. L., Chamberlain, L. J., Bassett, H. K., Ramaraj, R., Schwenk, H. T., Teufel, R. J., & Schroeder, A. R. (n.d.).

Publication year

2024

Journal title

Pediatrics
Abstract
Abstract
Repurposed medications for acute coronavirus disease 2019 (COVID-19) continued to be prescribed after results from rigorous studies and national guidelines discouraged use. We aimed to describe prescribing rates of nonrecommended medications for acute COVID-19 in children, associations with demographic factors, and provider type and specialty.

Primary Care Diagnosis and Treatment of Attention-Deficit/Hyperactivity Disorder in School-Age Children: Trends and Disparities During the COVID-19 Pandemic

Dahlen, A., Bannett, Y., Dahlen, A., Huffman, L. C., & Feldman, H. M. (n.d.).

Publication year

2022

Journal title

Journal of Developmental & Behavioral Pediatrics

Volume

43

Issue

7

Page(s)

386--392
Abstract
Abstract
~

Quantifying bias introduced by sample collection in relative and absolute microbiome measurements

Dahlen, A., Maghini, D. G., Dvorak, M., Dahlen, A., Roos, M., Doyle, B., Kuersten, S., & Bhatt, A. S. (n.d.).

Publication year

2024

Journal title

Nature biotechnology

Volume

42

Issue

2

Page(s)

328-338
Abstract
Abstract
To gain insight into the accuracy of microbial measurements, it is important to evaluate sources of bias related to sample condition, preservative method and bioinformatic analyses. There is increasing evidence that measurement of the total count and concentration of microbes in the gut, or 'absolute abundance', provides a richer source of information than relative abundance and can correct some conclusions drawn from relative abundance data. However, little is known about how preservative choice can affect these measurements. In this study, we investigated how two common preservatives and short-term storage conditions impact relative and absolute microbial measurements. OMNIgene GUT OMR-200 yields lower metagenomic taxonomic variation between different storage temperatures, whereas Zymo DNA/RNA Shield yields lower metatranscriptomic taxonomic variation. Absolute abundance quantification reveals two different causes of variable Bacteroidetes:Firmicutes ratios across preservatives. Based on these results, we recommend OMNIgene GUT OMR-200 preservative for field studies and Zymo DNA/RNA Shield for metatranscriptomics studies, and we strongly encourage absolute quantification for microbial measurements.

Refraction of a Gaussian seaway

Dahlen, A., Heller, E. J., Kaplan, L., & Dahlen, A. (n.d.).

Publication year

2008

Journal title

Journal of Geophysical Research: Oceans

Volume

113

Issue

C9
Abstract
Abstract
~

Remote Monitoring for Seizures During Therapeutic Hypothermia in Neonates With Hypoxic-Ischemic Encephalopathy

Dahlen, A., Variane, G., Dahlen, A., Pietrobom, R., Rodrigues, D. P., Magalh~aes, M., Mimica, M. J., Llaguno, N. S., Leandro, D., Girotto, P. N., Sampaio, L. B., & others. (n.d.).

Publication year

2023

Journal title

JAMA Network Open

Volume

6

Issue

11

Page(s)

e2343429--e2343429
Abstract
Abstract
~

Retrospective Observational Analysis of Free Serum Retinol in a Cohort of Pediatric Patients with Short Bowel Syndrome and Intestinal Failure

Dahlen, A., Smith, A., Dahlen, A., Diyaolu, M., McDonnell, E., Kerner, J., Dunn, J. C., & Namjoshi, S. (n.d.).

Publication year

2023

Journal title

SN Comprehensive Clinical Medicine

Volume

5

Issue

1

Page(s)

287
Abstract
Abstract
~

Small steps and giant leaps in the landscape

Dahlen, A., Brown, A. R., & Dahlen, A. (n.d.).

Publication year

2010

Journal title

Physical Review D

Volume

82

Issue

8

Page(s)

083519
Abstract
Abstract
~

Spectrum and stability of compactifications on product manifolds

Dahlen, A., Brown, A. R., & Dahlen, A. (n.d.).

Publication year

2014

Journal title

Physical Review D

Volume

90

Issue

4

Page(s)

044047
Abstract
Abstract
~

Systems and control software for the Atacama Cosmology Telescope

Dahlen, A., Switzer, E. R., Allen, C., Amiri, M., Appel, J. W., Battistelli, E. S., Burger, B., Chervenak, J. A., Dahlen, A. J., Das, S., Devlin, M. J., & others. (n.d.).

Publication year

2008

Volume

7019

Page(s)

856--867
Abstract
Abstract
~

The effects of the mechanical performance and alignment of the Atacama Cosmology Telescope on the sensitivity of microwave observations

Dahlen, A., Hincks, A. D., Ade, P. A., Allen, C., Amiri, M., Appel, J. W., Battistelli, E. S., Burger, B., Chervenak, J. A., Dahlen, A. J., Denny, S., & others. (n.d.).

Publication year

2008

Volume

7020

Page(s)

462--471
Abstract
Abstract
~

The Safety of Body Wraps on Skin-to-Skin Care in the Neonatal Population: A Pilot Study

Dahlen, A., Freccero, A., Scala, M., McLeod, K. A. A., Donahue, B., Webb, M., Briggs, M., Najm, I., Sinha, M., Santagata, L., Dahlen, A., & Nasr, A. (n.d.).

Publication year

2024

Journal title

Advances in neonatal care : official journal of the National Association of Neonatal Nurses

Volume

24

Issue

1

Page(s)

E11-E19
Abstract
Abstract
Despite well-established benefits of skin-to-skin care (SSC) for preterm infants and parents, standardized guidelines for implementation do not exist. Furthermore, the literature offers little evidence-based information to guide best practice.

Therapeutic Hypothermia for Neonatal Hypoxic-Ischemic Encephalopathy: Reducing Variability in Practice through a Collaborative Telemedicine Initiative

Dahlen, A., Leandro, D. M. K., Variane, G. F. T., Dahlen, A., Pietrobom, R. F. R., de Castro, J. A. R. R., Rodrigues, D. P., Magalhães, M., Mimica, M. J., Van Meurs, K. P., & Chock, V. Y. (n.d.).

Publication year

2024

Journal title

American journal of perinatology
Abstract
Abstract
 This study aimed to assess the viability of implementing a tele-educational training program in neurocritical care for newborns diagnosed with hypoxic-ischemic encephalopathy (HIE) and treated with therapeutic hypothermia (TH), with the goal of reducing practice variation.

Vacuum Decay in a Flux Landscape

Dahlen, A., & Dahlen, A. (n.d.).

Publication year

2011
Abstract
Abstract
~

Contact

alex.dahlen@nyu.edu 708 Broadway New York, NY, 10003
NYU School of Global Public Health
708 Broadway
New York, NY 10003

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