Sturmer T, Rothman KJ, Avorn J, Glynn RJ. Treatment effects in the presence of unmeasured confounding: dealing with observations in the tails of the propensity score distribution—A simulation study. Am J Epidemiol. 2010 Oct 17;172(7):843-54.
Sturmer T, Schneeweiss S, Brookhart MA, Rothman KJ, Avorn J, Glynn RJ. Comparing analytic strategies using propensity and disease risk scores: the example of nonsteroidal antiinflammatory drugs (NSAID) and short-term mortality in the elderly. Am J Epidemiol. 2004 Jan 1;159(11):S67.