Scientific methods in long-term outcome evaluation of preventive health programs. A critique of the randomized controlled trial.
D003362:Cost-Benefit Analysis; D003657:Decision Making; D004341:Drug Evaluation / Q000379:methods*; D006285:Health Planning; D011314:Preventive Health Services / Q000592:standards*; D011897:Random Allocation; D012107:Research Design; D013223:Statistics as Topic