Limits of Propensity Score Weighting Adjustment for Unit Nonresponse

Nonresponse rates in epidemiologic studies have been observed to increase in recent years regardless of the disease studied, geographical region or age of the study population. Unit nonresponse reduces sample size and study power. It can also cause biased estimates if significant differences exist between respondents and nonrespondents. One of the most common methodologies used to eliminate nonresponse bias, which is a kind of selection bias, is propensity score weighting. In this study, we examine the limits of propensity score weighting when used in unit nonresponse adjustments.

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