Nutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran; Department of Nutrition, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Yazd Cardiovascular Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Clin Nutr ESPEN. 2021 Dec;46:471-476. doi: 10.1016/j.clnesp.2021.09.007. Epub 2021 Sep 20.
BACKGROUND & AIMS: Current data on the association between dietary glycemic index (GI) and glycemic load (GL) and sleep duration are limited and controversial. The present cross-sectional study aimed to investigate the relationship between dietary GI and GL with sleep duration in a large number of adults living in central Iran.
Baseline data from two Iranian cohorts were pooled for the current analysis: the YaHS-TAMYZ (n = 9962) and Shahedieh (n = 9977) studies. Demographic data as well as dietary intakes, sleep duration, and possible confounders, were collected by interview. Anthropometric measurements were also conducted by trained interviewers. Participants were categorized based on sleep duration [short (<6 h), normal (6-8 h), and long (>8 h)]. Multivariable logistic regression was used to determine the relationship between dietary GI/GL and the likelihood of short and long sleep duration.
In total, 10,451 participants aged 20-70 years were included in the analyses. After controlling for all possible confounders, no significant association was observed between dietary GI and short or long sleep duration (P > 0.05). Individuals in the highest quartile of dietary GL had a higher chance for long sleep duration compared to participants in the lowest quartile (OR = 1.41; 95% CI: 1.14, 1.74, P = 0.001). No significant association was observed between dietary GL and short sleep duration.
Dietary GL is positively associated with the likelihood of long sleep duration. Future prospective studies are required to confirm the current findings.
目前关于饮食血糖指数（GI）和血糖负荷（GL）与睡眠时间之间关联的资料有限且存在争议。本横断面研究旨在调查伊朗中部大量成年人中饮食 GI 和 GL 与睡眠时间之间的关系。
目前的分析汇总了两项伊朗队列研究的基线数据：YaHS-TAMYZ（n=9962）和 Shahedieh（n=9977）研究。通过访谈收集了人口统计学数据以及饮食摄入量、睡眠时间和可能的混杂因素。由经过培训的访谈者进行了人体测量。根据睡眠时间[短（<6 小时）、正常（6-8 小时）和长（>8 小时）]对参与者进行分类。多变量逻辑回归用于确定饮食 GI/GL 与短和长睡眠时间可能性之间的关系。
共纳入了 10451 名年龄在 20-70 岁的参与者进行分析。在控制所有可能的混杂因素后，饮食 GI 与短或长睡眠时间之间无显著关联（P>0.05）。与最低四分位数的参与者相比，饮食 GL 最高四分位数的个体长睡眠时间的可能性更高（OR=1.41；95%CI：1.14，1.74，P=0.001）。饮食 GL 与短睡眠时间之间无显著关联。
饮食 GL 与长睡眠时间的可能性呈正相关。需要进一步的前瞻性研究来证实目前的发现。
