Freedman David S, Khan Laura Kettel, Serdula Mary K, Galuska Deborah A, Dietz William H
Division of Nutrition and Physical Activity, Centers for Disease Control and Prevention, Mailstop K-26, 4770 Buford Hwy, Atlanta, GA 30341-3717, USA.
JAMA. 2002 Oct 9;288(14):1758-61. doi: 10.1001/jama.288.14.1758.
Although the prevalence of obesity has markedly increased among US adults, health risks vary according to the severity of obesity. Persons with class 3 obesity (body mass index [BMI] > or = 40) are at greatest risk, but there is little information about this subgroup.
To examine correlates of class 3 obesity and secular trends.
DESIGN, SETTING, AND PARTICIPANTS: Adults (aged > or = 18 years) in the United States who participated in the Behavioral Risk Factor Surveillance System telephone survey between 1990 (75,600 persons) and 2000 (164,250 persons).
Body mass index calculated from self-reported weight and height.
The prevalence of class 3 obesity increased from 0.78% (1990) to 2.2% (2000). In 2000, class 3 obesity was highest among black women (6.0%), persons who had not completed high school (3.4%), and persons who are short. During the 11-year period, the median BMI level increased by 1.2 units and the 95th percentile increased by 3.2 units.
The prevalence of class 3 obesity is increasing rapidly among adults. Because these extreme BMI levels are associated with the most severe health complications, the incidence of various diseases will increase substantially in the future.
尽管美国成年人肥胖患病率显著上升，但健康风险因肥胖严重程度而异。3级肥胖（体重指数[BMI]≥40）者风险最高，但关于这一亚组的信息较少。
研究3级肥胖的相关因素及长期趋势。
设计、地点和参与者：1990年（75600人）至2000年（164250人）期间参加行为危险因素监测系统电话调查的美国成年人（年龄≥18岁）。
根据自我报告的体重和身高计算的体重指数。
3级肥胖患病率从1990年的0.78%增至2000年的2.2%。2000年，3级肥胖在黑人女性（6.0%）、未完成高中学业者（3.4%）和身材矮小者中最为常见。在这11年期间，BMI中位数水平上升了1.2个单位，第95百分位数上升了3.2个单位。
成年人中3级肥胖患病率正在迅速上升。由于这些极高的BMI水平与最严重的健康并发症相关，未来各种疾病的发病率将大幅增加。
