title: Stratified analysis of case-control studies with the factor under study taking multiple values.
mesh_terms: D000236:Adenoma / Q000209:etiology; D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000000981:diagnostic imaging; D003276:Contraceptives, Oral / Q000009:adverse effects; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000209:etiology; D008327:Mammography; D008875:Middle Aged; D012306:Risk; D013223:Statistics as Topic
chemical_list: D003276:Contraceptives, Oral