@article {1459, title = {Methodological issues in design and analysis of a matched case-control study of a vaccine{\textquoteright}s effectiveness.}, journal = {Journal of clinical epidemiology}, volume = {60}, year = {2007}, month = {2007 Nov}, pages = {1127-31}, abstract = {Case-control studies of the effectiveness of a vaccine are useful to answer important questions, such as the effectiveness of a vaccine over time, that usually are not addressed by prelicensure clinical trials of the vaccine{\textquoteright}s efficacy. This report describes methodological issues related to design and analysis that were used to determine the effects of time since vaccination and age at the time of vaccination.}, keywords = {Age Factors, Case-Control Studies, Chickenpox Vaccine, Epidemiologic Research Design, Humans, Logistic Models, Odds Ratio, Patient Selection, Risk Assessment, Time Factors, Treatment Outcome}, issn = {0895-4356}, doi = {10.1016/j.amepre.2011.06.032}, author = {Niccolai, Linda M and Ogden, Lorraine G and Muehlenbein, Catherine E and Dziura, James D and V{\'a}zquez, Marietta and Shapiro, Eugene D} }