1. Stata 9, Epi tables, Survey, Factor Tables for epidemiologists Survey commands Factor analysis 29.10.2015H.S.1

2. Tables for epidemiologists Commands –csCohort study with incidence proportion –irCohort study with incidence rate –ccCase-control –mccMatched case-control Example –cc diseased exposed, by(sex)Stratified MH-OR Calculator (i=immideate) –csi 100 50 900 950RR –iri 100 50 1000 1000RR –cci 10 90 5 95OR 29.10.2015H.S.2

3. Survey commands Purpose –A family of commands to account for survey designg effects (stratification (and clustering)) Workflow –svyset [pweight=p1],strata(country)set probability weights and stratification –svy:mean x1weighted mean –Regressions do not need weighting 29.10.2015H.S.3

4. Factor analysis Purpose –Find latent factors from a large set of variables Workflow –factor x1 x2 x3factor analysis –screeplotplot eigenvalues –factor x1 x2 x3, factors(3)max 3 factors –estat kmosampling OK? –rotatevarimax rotation –loadingplot2 first factors 29.10.2015H.S.4