title: Interpretation of longitudinal studies. An overview.
authors.affiliation: Faculty of Medicine, Department of Epidemiology and Statistics, University of Groningen, The Netherlands.
authors.forename: J P
authors.initials: JP
authors.lastname: Schouten
authors.forename: I B
authors.initials: IB
authors.lastname: Tager
mesh_terms: D000375:Aging / Q000502:physiology; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D005541:Forced Expiratory Volume / Q000502:physiology; D006801:Humans; D008137:Longitudinal Studies; D008168:Lung / Q000502:physiology; D012129:Respiratory Function Tests / Q000706:statistics & numerical data*