Identifying the energy gap: Magnitude and determinants of 5-year weight gain in midage women
Identifying the energy gap: Magnitude and determinants of 5-year weight gain in midage women
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DOI：
10.1038/oby.2005.173
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发表时间：
2005-08-01
期刊：
影响因子：
--
通讯作者：
Dobson, AJ
中科院分区：
文献类型：
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作者：
Brown, WJ;Williams, L;Dobson, AJ
目的：本研究的目的是估计中年女性的平均每年体重增加情况，并确定体重增加和体重增加平均速度加倍的决定因素。研究方法和程序：研究样本包括澳大利亚妇女健康纵向研究的 8071 名参与者（45 至 55 岁），他们在 1996 年、1998 年和 2001 年完成了邮寄调查。结果：平均而言，妇女增加了几乎每年 0.5 公斤 [5 年内平均 2.42 公斤（95% 置信区间，2.29 至 2.54）]。在多变量分析中，与能量平衡（体力活动、静坐时间和能量摄入）以及戒烟、绝经/子宫切除术和基线 BMI 类别相关的变量与体重增加显着相关，但其他行为和人口特征则不然。调整所有其他生物学和行为变量后，戒烟女性体重增加速度约为平均速度两倍（5 年内增加 5 公斤）的几率最高（优势比 = 2.94；95% 置信区间，2.17，3.96）。体重增加 > 5 公斤的几率与较低水平的习惯性体力活动、更多的久坐时间、能量摄入（但仅限于基线时 BMI > 25 的女性）、更年期过渡和子宫切除术之间也存在独立关系。讨论：平均体重增加相当于每天仅约 10 kcal 或 40 kJ 的能量不平衡，这表明可修改的行为变量的微小持续变化可以防止体重进一步增加。
Objective: The aims of this study were to estimate average yearly weight gain in midage women and to identify the determinants of weight gain and gaining weight at double the average rate.Research Methods and Procedures: The study sample comprised 8071 participants (45 to 55 years old) in the Australian Longitudinal Study on Women's Health who completed mailed surveys in 1996, 1998, and 2001.Results: On average, the women gained almost 0.5 kg per year [average 2.42 kg (95% confidence interval, 2.29 to 2.54) over 5 years]. In multivariate analyses, variables associated with energy balance (physical activity, sitting time, and energy intake), as well as quitting smoking, menopause/hysterectomy, and baseline BMI category were significantly associated with weight gain, but other behavioral and demographic characteristics were not. After adjustment for all of the other biological and behavioral variables, the odds of gaining weight at about twice the average rate (> 5 kg over 5 years) were highest for women who quit smoking (odds ratio = 2.94; 95% confidence interval, 2.17, 3.96). There were also independent relationships between the odds of gaining > 5 kg and lower levels of habitual physical activity, more time spent sitting, energy intake (but only in women with BMI > 25 at baseline), menopause transition, and hysterectomy.Discussion: The average weight gain equates with an energy imbalance of only about 10 kcal or 40 kJ per day, which suggests that small sustained changes in the modifiable behavioral variables could prevent further weight gain.