Sleep deficiency is becoming widespread in both adults and adolescents and is accompanied by certain behaviors that can lead to obesity. This study aims to investigate differences in sleep duration of overweight/obese and normal weight groups, and the association between sleep deprivation and obesity, dietary intake and physical activity. A cross-sectional study was conducted among 226 Iranian working adults (109 men and 117 women) aged 20 to 55 years old who live in Tehran. Body weight, height, waist and hip circumferences were measured, and BMI was calculated. Questionnaires, including the Sleep Habit Heart Questionnaire (SHHQ), International Physical Activity Questionnaire (IPAQ) and 24-hour dietary recall, were interview-administered. Subjects were categorized as normal weight (36.3%) or overweight/obese (63.7%) based on WHO standards (2000). Overweight/ obese subjects slept significantly (p<0.001) later (00:32±00:62 AM) and had shorter sleep duration (5.37±1.1 hours) than normal weight subjects (23:30±00:47 PM and 6.54±1.06 hours, respectively). Sleep duration showed significant (p<0.05) direct correlations to energy (r = 0.174), carbohydrate (r = 0.154) and fat intake (r = 0.141). This study revealed that each hour later in bedtime (going to bed later) increased the odds of being overweight or obese by 2.59-fold (95% CI: 1.61-4.16). The findings in this study confirm that people with shorter sleep duration are more likely to be overweight or obese; hence, strategies for the management of obesity should incorporate a consideration of sleep patterns.
睡眠不足在成年人及青少年已成為普遍的現象，這伴隨著某些行為可能導致肥 胖。此研究目的為研究體重過重/肥胖及正常體位者的睡眠時間差異，以及睡 眠不足與肥胖、飲食攝取及體能活動的相關性。本橫斷性研究的研究對象來自 於居住在德黑蘭的226 名伊朗在職成人(109 名男性及117 名女性)，年齡介於 20 至55 歲。測量受訪者的體重、身高、腰臀圍，並計算其BMI。在面訪時使 用包含睡眠習慣心臟問卷(SHHQ)、國際體能活動問卷(IPAQ)及24 小時飲食回 憶問卷。研究對象依據WHO 標準(2000)被分類為正常體重(36.3%)或是體重過 重/肥胖(63.7%)。體重過重/肥胖者(凌晨00:32±00:62 就寢)比起正常體重者(夜 晚23:30±00:47 就寢及6.54±1.06 小時睡眠)顯著較晚睡覺，且有較短的睡眠時 間(5.37±1.1 小時)。睡眠時間則與熱量(r=0.174)、碳水化合物(r=0.154)及脂肪 (r=0.141)攝取量有顯著的直接相關性。這個研究亦發現，就寢時間每延後一小 時，體重過重或肥胖的機率則增加2.59 倍(95% CI=1.61-4.16)。此研究結果證 實，睡眠時間較短者較可能為體重過重或是肥胖；因此，肥胖的管理策略應同 時考量睡眠模式。