Publications

The control outcome calibration approach for causal inference with unobserved confounding.

Author(s): Tchetgen Tchetgen E|Journal: Am J Epidemiol|PMID: 24363326| March 2014

Unobserved confounding can seldom be ruled out with certainty in nonexperimental studies. Negative controls are sometimes used in epidemiologic practice…

Estimating rates of carriage acquisition and clearance and competitive ability for pneumococcal serotypes in Kenya with a Markov transition model.

Author(s): Lipsitch M, Abdullahi O, DʼAmour A, Xie W, Weinberger DM, Tchetgen Tchetgen E, Scott JA|Journal: Epidemiology|PMID: 22441543| July 2012

There are more than 90 serotypes of Streptococcus pneumoniae, with varying biologic and epidemiologic properties. Animal studies suggest that carriage…

Searching for sharp drops in the incidence of pandemic A/H1N1 influenza by single year of age.

Author(s): Jacobs JH, Archer BN, Baker MG, Cowling BJ, Heffernan RT, Mercer G, Uez O, Hanshaoworakul W, Viboud C, Schwartz J, Tchetgen Tchetgen E, Lipsitch M|Journal: PLoS One|PMID: 22876316| January 2012

During the 2009 H1N1 pandemic (pH1N1), morbidity and mortality sparing was observed among the elderly population; it was hypothesized that…

Negative controls: a tool for detecting confounding and bias in observational studies.

Author(s): Lipsitch M, Tchetgen Tchetgen E, Cohen T|Journal: Epidemiology|PMID: 20335814| May 2010

Noncausal associations between exposures and outcomes are a threat to validity of causal inference in observational studies. Many techniques have…