Li Chaoyang, Ford Earl S, McGuire Lisa C, Mokdad Ali H
Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, 4770 Buford Highway, MS K66, Atlanta, GA 30341, USA.
Obesity (Silver Spring). 2007 Jan;15(1):216-24. doi: 10.1038/oby.2007.505.
Some studies have shown that abdominal obesity may be a better predictor than overall obesity for disease risks and all-cause mortality. This study sought to examine the recent trends in waist circumference (WC) among adults in the United States.
Data from the National Health and Nutrition Examination Survey during 1988-1994, 1999-2000, 2001-2002, and 2003-2004 were analyzed to estimate the trends in the mean WC and the prevalence of abdominal obesity. Pooled t tests were used to test the differences in estimates between two time periods.
Between the periods of 1988-1994 and 2003-2004, the age-adjusted mean WC increased from 96.0 cm to 100.4 cm among men (p < 0.001) and from 89.0 cm to 94.0 cm among women (p < 0.001); the age-adjusted prevalence of abdominal obesity increased from 29.5% to 42.4% among men (p < 0.001) and from 47.0% to 61.3% among women (p < 0.001). Between the periods of 1999-2000 and 2003-2004, a significant increase occurred in mean WC only among men (from 99.0 cm to 100.4 cm; p = 0.03) and in the prevalence of abdominal obesity among both men (from 37.0% to 42.2%; p = 0.03) and women (from 55.3% to 61.3%; p = 0.04). People with a BMI of 25 to 29 kg/m2 had a greater relative increase in abdominal obesity.
The mean WC and the prevalence of abdominal obesity among U.S. adults have increased continuously during the past 15 years. Over one-half of U.S. adults had abdominal obesity in the period of 2003-2004.
一些研究表明，对于疾病风险和全因死亡率而言，腹部肥胖可能比总体肥胖是更好的预测指标。本研究旨在调查美国成年人腰围（WC）的近期趋势。
分析了1988 - 1994年、1999 - 2000年、2001 - 2002年和2003 - 2004年期间美国国家健康和营养检查调查的数据，以估计平均腰围和腹部肥胖患病率的趋势。采用合并t检验来检验两个时间段估计值之间的差异。
在1988 - 1994年至2003 - 2004年期间，男性年龄调整后的平均腰围从96.0厘米增加到100.4厘米（p < 0.001），女性从89.0厘米增加到94.0厘米（p < 0.001）；男性腹部肥胖的年龄调整患病率从29.5%增加到42.4%（p < 0.001），女性从47.0%增加到61.3%（p < 0.001）。在1999 - 2000年至2003 - 2004年期间，仅男性的平均腰围有显著增加（从99.0厘米增加到100.4厘米；p = 0.03），男性（从37.0%增加到42.2%；p = 0.03）和女性（从55.3%增加到61.3%；p = 0.04）的腹部肥胖患病率均有显著增加。体重指数（BMI）为25至29千克/平方米的人群腹部肥胖的相对增加幅度更大。
在过去15年中，美国成年人的平均腰围和腹部肥胖患病率持续上升。在2003 - 2004年期间，超过一半的美国成年人患有腹部肥胖。
