title: Analysis of change over time.
abstract: A brief introduction is given to methods for analysis of epidemiological data where the exposure variable may change over time. The techniques discussed are related to both classical epidemiological methods for analysing the effect of a fixed, dichotomous exposure variable on a dichotomous response variable and to methods for analysis of life time data. Two examples are presented.
authors.affiliation: Statistical Research Unit, University of Copenhagen, Denmark.
authors.forename: P K
authors.initials: PK
authors.lastname: Andersen
mesh_terms: D000328:Adult; D002648:Child; D003550:Cystic Fibrosis / Q000401:mortality; D003627:Data Interpretation, Statistical; D004781:Environmental Exposure; D004812:Epidemiologic Methods; D006801:Humans; D015993:Life Tables; D008103:Liver Cirrhosis / Q000401:mortality; D013997:Time Factors