Energy density and weight change in a long-term weight-loss trial
Energy density and weight change in a long-term weight-loss trial
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DOI：
10.1186/1479-5868-6-57
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发表时间：
2009-08-14
影响因子：
8.7
通讯作者：
Jeffery, Robert W.
中科院分区：
文献类型：
--
作者：
Flood, Andrew;Mitchell, Nathan;Jeffery, Robert W.
背景资料：健康风险与肥胖和困难，最有在实现减肥强调的重要性，确定饮食因素，有助于成功weightloss.Methods：本研究探讨了饮食能量密度的变化和减肥随着时间的推移之间的关联。受试者为213名男性和女性，BMI为3039 kg/m2，无慢性疾病，于2004年参加了一项随机试验，评估长期减肥的行为治疗。受试者完成了62项食物频率问卷调查，在基线和6，12，18 months.Results：皮尔森相关BMI和能量密度（千卡/克固体食物）在基线没有显着差异，从零（r =-0.02，p = 0.84）。在纵向分析中，能量密度的变化与BMI的变化密切相关。在18个月时，四分位数中代表能量密度下降最大的患者的BMI（kg/m2）变化的估计β值与四分位数中最小的患者相比为-1.95（p = 0.006）。这种关联在前六个月尤为强烈（估计β = -1.43），体重减轻最多的时期（06个月时BMI的平均变化=-2.50 kg/m2，12个月时为0.23 kg/m2，18个月时为0.23 kg/m2），能量密度变化的对比最大。在这项为期18个月的减肥研究中，能量密度降低可预测体重减轻。这些发现可能对个人饮食建议和针对一般人群体重控制的公共卫生政策具有重要意义
Background: Health risks linked to obesity and the difficulty most have in achieving weight loss underscore the importance of identifying dietary factors that contribute to successful weight loss.Methods: This study examined the association between change in dietary energy density and weight loss over time. Subjects were 213 men and women with BMI of 3039 kg/m(2) and without chronic illness enrolled in 2004 in a randomized trial evaluating behavioral treatments for long-term weight loss. Subjects completed a 62-item food frequency questionnaire at baseline and at 6, 12, and 18 months.Results: Pearson correlations between BMI and energy density (kcals/g of solid food) at baseline were not significantly different from zero (r = -0.02, p = 0.84). In a longitudinal analysis, change in energy density was strongly related to change in BMI. The estimated beta for change in BMI (kg/m(2)) of those in the quartile representing greatest decrease in energy density at 18 months compared to those in the quartile with the least was -1.95 ( p = 0.006). The association was especially strong in the first six months ( estimated beta = -1.43), the period with greatest weight loss ( mean change in BMI = - 2.50 kg/m(2) from 06 months vs. 0.23 kg/m(2) from 1218 months) and the greatest contrast with respect to change in energy density.Conclusion: Decreased energy density predicted weight loss in this 18 month weight loss study. These findings may have important implications for individual dietary advice and public health policies targeting weight control in the general population