PLEASE NOTE: We are currently in the process of updating this chapter and we appreciate your patience whilst this is being completed. See "Design, applications, strengths and weaknesses of cross-sectional, analytical studies (including cohort, case-control and nested case-control studdies), and intervention studies (including randomised controlled trials" Book traversal links for Nested case-control studies ‹ Time-trend analysis, time series designs Up Methods of sampling from a population ›