Prev Med. 2009 Aug-Sep;49(2-3):158-64. doi: 10.1016/j.ypmed.2009.06.030. Epub 2009 Jul 14.
We examined whether the reported prevalence of trying to lose weight among overweight and obese individuals has changed over time, and whether those trying to lose weight report using recommended weight-loss strategies.
We used Behavioral Risk Factor Surveillance System data from 50 states and the District of Columbia during 1996, 1998, 2000, and 2003. The sample included participants with a self-reported Body Mass Index (BMI) of > or =25.0 kg/m(2) (N=333,378). The prevalence of trying to lose weight and eating fewer calories, using physical activity, or both, were examined for endpoint change and linear trends.
Between 1996 and 2003, the prevalence of trying to lose weight among obese individuals increased significantly, while it remained stable among overweight individuals. The prevalence of eating fewer calories, using physical activity and using a combination of both increased significantly over time among the overweight and obese individuals trying to lose weight.
Despite a rise in the number of overweight and obese people, there was little change among overweight adults in trying to lose weight over time, and a modest-but significant-change among obese adults in trying to lose weight over time. Among those who reported trying to lose weight, there were significant increases in their efforts to use recommended strategies.
我们研究超重和肥胖人群中报告的减肥尝试率是否随时间发生变化，以及减肥尝试者是否报告使用了推荐的减肥策略。
我们使用了 1996 年、1998 年、2000 年和 2003 年来自 50 个州和哥伦比亚特区的行为风险因素监测系统数据。样本包括自我报告体重指数（BMI）≥25.0kg/m²的参与者（N=333378）。我们检查了减肥尝试率以及减少热量摄入、进行体力活动或两者兼有的减肥策略的使用情况，以了解终点变化和线性趋势。
在 1996 年至 2003 年期间，肥胖人群中减肥尝试的比例显著增加，而超重人群中的比例则保持稳定。超重和肥胖人群中试图减肥的人群中，减少热量摄入、进行体力活动以及两者结合使用的比例随着时间的推移显著增加。
尽管超重和肥胖人群的数量有所增加，但超重成年人减肥尝试的比例随时间变化不大，而肥胖成年人减肥尝试的比例随时间变化略有增加。在报告试图减肥的人群中，他们使用推荐策略的努力显著增加。
