Health Analysis Division, Statistics Canada, Ottawa, Ontario.
Health Rep. 2009 Dec;20(4):11-20.
The contribution of specific nutrients to obesity has not been definitively established. The objective of this study was to determine if an association exists between obesity and the relative percentages of fats, carbohydrates, protein and fibre in the diets of Canadians.
The data are from the 2004 Canadian Community Health Survey--Nutrition. The analysis pertains to 6454 respondents aged 18 or older who provided valid 24-hour dietary recall information and measured height and weight, and whose reported energy intake was considered plausible based on their predicted energy expenditure. Logistic regression models with obesity status as the main outcome were conducted, controlling for potential confounders. All analyses were based on weighted estimates.
When the effect of the control variables was taken into account, total kilocalories consumed increased the odds of obesity in men, and fibre intake decreased the odds. Among women, only total kilocalories consumed was significantly associated with increased odds of obesity.
Higher consumption of kilocalories increased the odds of obesity, but the relative amounts of fats, carbohydrates and protein were generally not significant. The sole exception was an association between higher fibre intake and lower rates of obesity among men.
特定营养素对肥胖的贡献尚未得到明确证实。本研究的目的是确定加拿大饮食中的脂肪、碳水化合物、蛋白质和纤维的相对百分比与肥胖之间是否存在关联。
数据来自 2004 年加拿大社区健康调查-营养。该分析涉及 6454 名年龄在 18 岁或以上的受访者，他们提供了有效的 24 小时饮食回忆信息，并测量了身高和体重，且根据其预测的能量消耗，报告的能量摄入量被认为是合理的。使用肥胖状况作为主要结果的逻辑回归模型，控制了潜在的混杂因素。所有分析均基于加权估计。
当考虑到控制变量的影响时，男性摄入的总卡路里量增加了肥胖的几率，而纤维摄入量则降低了肥胖的几率。对于女性，只有总卡路里摄入量与肥胖几率的增加显著相关。
摄入更多的卡路里会增加肥胖的几率，但脂肪、碳水化合物和蛋白质的相对量通常并不重要。唯一的例外是男性中较高的纤维摄入量与较低的肥胖率之间存在关联。
