title: Epidemiology for nutritionists: 3. The design of studies.
abstract: For convenience of the reader epidemiological studies are described here as being of cross-sectional, retrospective, prospective or interventional design.
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D004034:Diet Surveys; D004812:Epidemiologic Methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009748:Nutrition Disorders / Q000150:complications / Q000453:epidemiology / Q000517:prevention & control; D009747:Nutritional Physiological Phenomena; D011247:Pregnancy; D011446:Prospective Studies; D012189:Retrospective Studies; D013222:State Medicine; D014852:Wales