便秘
全国健康与营养检查调查
医学
混淆
逻辑回归
内科学
横断面研究
胃肠病学
环境卫生
人口
病理
摘要
Abstract Background The association between dietary protein intake and constipation remains inconclusive. The aim of this study was to investigate whether dietary protein intake is associated with constipation. Methods This cross‐sectional study included 13,941 adults from the 2005 to 2010 National Health and Nutrition Examination Survey. A weighted logistic regression analysis was used to control for confounding factors. In addition, weighted interaction and stratified analyses were conducted to ascertain the potential modifying factors. Results The prevalence of constipation was 7.5% when constipation was defined by stool consistency and 3.5% when constipation was defined by stool frequency. After adjusting for covariates, an increase in dietary protein intake of 10 g was not associated with constipation, as defined by stool frequency (OR = 0.94, 95% CI = 0.54, 1.62) or stool consistency (OR = 1.02, 95% CI = 0.75, 1.39). Subgroup analyses revealed that dietary protein intake was associated with an increase in constipation defined by stool consistency risk in participants who consumed a low amount of carbohydrates (OR = 1.08, 95% CI = 1.02–1.14 for every 10‐g increase in protein intake), but a decrease in risk in participants in the moderate‐carbohydrate group (OR = 0.94, 95% CI = 0.89–0.99 for every 10‐g increase in protein intake), suggesting a significant interaction ( p = 0.001). Conclusion & Inferences Dietary protein intake is not associated with stool consistency or frequency‐defined constipation. However, the association between dietary protein intake and constipation defined by stool consistency in participants with a low carbohydrate intake differed from that in participants with a moderate carbohydrate intake.
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