Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku, Finland.
BMJ Open. 2013 Jun 20;3(6):e002901. doi: 10.1136/bmjopen-2013-002901.
Sedentary behaviour may contribute to the development of obesity. We investigated the relations between different types of sedentary behaviour and adiposity markers in a well-characterised adult population after controlling for a wide range of potential confounders.
Cross-sectional study.
The Cardiovascular Risk in Young Finns Multicenter Study. Participants Sedentary time (TV viewing, computer time, reading, music/radio listening and other relaxation) was assessed with a questionnaire for 1084 women and 909 men aged 30-45 years. Other study variables included occupational and leisure-time physical activity, sleep duration, socioeconomic status, smoking, alcohol consumption, energy intake, adherence to the recommended diet, multiple individual food items, age and genetic variants associated with body mass index (BMI). Primary outcome measures BMI in kg/m(2) and waist circumference (WC in cm).
Of the different sedentary behaviour types, TV viewing was most consistently related to higher BMI and WC, both in men and women. One additional daily TV hour was associated with a 1.81±0.44 cm larger WC in women and 2 cm±0.44 cm in men (both p<0.0001). The association with TV was diluted, but remained highly significant after adjustments with all measured covariates, including several potentially obesogenic food items associated with TV viewing. The intakes of food items such as sausage, beer and soft drinks were directly associated with TV viewing, while the intakes of oat and barley, fish, and fruits and berries were associated indirectly. After these adjustments, non-TV sedentary behaviour remained associated with adiposity indices only in women.
Out of the different types of sedentary behaviour, TV viewing was most consistently associated with adiposity markers in adults. Partial dilution of these associations after adjustments for covariates suggests that the obesogenic effects of TV viewing are partly mediated by other lifestyle factors.
久坐行为可能导致肥胖的发生。我们在对大量潜在混杂因素进行校正后，在一个特征明确的成年人群中研究了不同类型的久坐行为与肥胖标志物之间的关系。
横断面研究。
芬兰年轻人心血管风险研究多中心研究。参与者久坐时间（看电视、使用电脑、阅读、听音乐/广播和其他放松活动）通过问卷调查评估，共涉及 1084 名女性和 909 名年龄在 30-45 岁的男性。其他研究变量包括职业和休闲时间体力活动、睡眠时间、社会经济地位、吸烟、饮酒、能量摄入、推荐饮食的遵守情况、多种个体食物、年龄和与体重指数（BMI）相关的遗传变异。
体重指数（kg/m²）和腰围（cm）。
在不同的久坐行为类型中，看电视与女性和男性的 BMI 和 WC 均呈最一致的正相关。女性每天多观看 1 个小时的电视，腰围会增加 1.81±0.44 cm，男性腰围增加 2.00±0.44 cm（均<0.0001）。与电视相关的关联虽然有所减弱，但在调整所有测量的混杂因素后，包括与看电视相关的几种潜在致肥胖食物后，仍具有高度显著性。香肠、啤酒和软饮料等食物的摄入量与看电视直接相关，而燕麦和大麦、鱼、水果和浆果的摄入量则与看电视间接相关。在这些调整后，非看电视的久坐行为仅在女性中与肥胖指数相关。
在不同类型的久坐行为中，看电视与成年人的肥胖标志物最一致相关。对混杂因素进行调整后，这些关联有所减弱，表明看电视的致肥胖作用部分是通过其他生活方式因素介导的。
