Assessing nonresponse bias at follow-up in a large prospective cohort of relatively young and mobile military service members.

ABSTRACT:

Background

Nonresponse bias in a longitudinal study could affect the magnitude and direction of measures of association. We identified sociodemographic, behavioral, military, and health-related predictors of response to the first follow-up questionnaire in a large military cohort and assessed the extent to which nonresponse biased measures of association.

Methods

Data are from the baseline and first follow-up survey of the Millennium Cohort Study. Seventy-six thousand, seven hundred and seventy-five eligible individuals completed the baseline survey and were presumed alive at the time of follow-up; of these, 54,960 (71.6%) completed the first follow-up survey. Logistic regression models were used to calculate inverse probability weights using propensity scores.

Results

SUBMITTER: Littman AJ 

PROVIDER: S-EPMC2984503 | biostudies-literature | 2010 Oct

REPOSITORIES: biostudies-literature