title: Morbid obesity: definitions, epidemiology, and methodological problems.
abstract: This article defines obesity, ideal body weight, morbid obesity, and indexes of overweight, pointing out some of the difficulties in studies of the epidemiology of morbid obesity.
mesh_terms: D001823:Body Composition; D001835:Body Weight; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D009767:Obesity, Morbid / Q000175:diagnosis / Q000453:epidemiology; D012307:Risk Factors; D014481:United States