Study designs in biomedical research: an introduction to the different types
Table Of Content Prospective vs Retrospective Studies Types of studies and research design Writing Survey Questions Article Level Metrics Random Allocation - A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. The exposure-odds ratio for case control data is the ratio of the odds in favor of exposure among cases to the odds in favor of exposure among noncases. The disease-odds ratio for a cohort or cross section is the ratio of the odds in favor of disease among the exposed to the odds in favor of disease among the unexposed. The prevalence-odds ratio refers to an odds ratio derived cross-sectionally from studies of prevalent cases. Longitudinal Studies - Studies in which variables relating to an individual or group of individuals are assessed over a period of time. Prospective vs Retrospective Studies In addition to the number a