Prevention Research Collaboration, Sydney University, Sydney, Australia.
Am J Prev Med. 2011 Aug;41(2):228-35. doi: 10.1016/j.amepre.2011.05.003.
Recent epidemiologic evidence points to the health risks of prolonged sitting, that are independent of physical activity, but few papers have reported the descriptive epidemiology of sitting in population studies with adults.
This paper reports the prevalence of "high sitting time" and its correlates in an international study in 20 countries.
Representative population samples from 20 countries were collected 2002-2004, and a question was asked on usual weekday hours spent sitting. This question was part of the International Prevalence Study, using the International Physical Activity Questionnaire (IPAQ). The sitting measure has acceptable reliability and validity. Daily sitting time was compared among countries, and by age group, gender, educational attainment, and physical activity.
Data were available for 49,493 adults aged 18-65 years from 20 countries. The median reported sitting time was 300 minutes/day, with an interquartile range of 180-480 minutes. Countries reporting the lowest amount of sitting included Portugal, Brazil, and Colombia (medians ≤180 min/day), whereas adults in Taiwan, Norway, Hong Kong, Saudi Arabia, and Japan reported the highest sitting times (medians ≥360 min/day). In adjusted analyses, adults aged 40-65 years were significantly less likely to be in the highest quintile for sitting than adults aged 18-39 years (AOR=0.796), and those with postschool education had higher sitting times compared with those with high school or less education (OR=1.349). Physical activity showed an inverse relationship, with those reporting low activity on the IPAQ three times more likely to be in the highest-sitting quintile compared to those reporting high physical activity.
Median sitting time varied widely across countries. Assessing sitting time is an important new area for preventive medicine, in addition to assessing physical activity and sedentary behaviors. Population surveys that monitor lifestyle behaviors should add measures of sitting time to physical activity surveillance. Moreover, the use of objective measures to capture the spectrum of sedentary (sitting) and physical activity behaviors is encouraged, particularly in low- and middle-income countries commencing new surveillance activities.
最近的流行病学证据表明，长时间坐着会对健康造成危害，这种危害独立于身体活动，但是很少有论文报道过人群研究中成年人久坐的描述性流行病学。
本文报告了在 20 个国家进行的一项国际研究中“长时间坐着”的流行率及其相关因素。
2002 年至 2004 年收集了来自 20 个国家的代表性人群样本，并询问了他们在工作日通常每天坐着的时间。这个问题是国际流行率研究的一部分，使用了国际体力活动问卷（IPAQ）。该坐立时间测量方法具有可接受的可靠性和有效性。比较了各国之间以及按年龄组、性别、教育程度和身体活动水平的每日坐立时间。
共有来自 20 个国家的 49493 名 18-65 岁成年人的数据可用。报告的中位坐立时间为 300 分钟/天，四分位间距为 180-480 分钟。报告的坐立时间最短的国家包括葡萄牙、巴西和哥伦比亚（中位数≤180 分钟/天），而台湾、挪威、中国香港、沙特阿拉伯和日本的成年人报告的坐立时间最长（中位数≥360 分钟/天）。在调整分析中，40-65 岁的成年人比 18-39 岁的成年人更不可能处于坐立时间最高的五分位数（AOR=0.796），而具有中学后教育程度的成年人比具有中学或以下教育程度的成年人的坐立时间更长（OR=1.349）。体力活动呈负相关，与报告 IPAQ 低活动的人相比，报告高体力活动的人更有可能处于坐立时间最高的五分位数。
各国的中位坐立时间差异很大。评估坐立时间是预防医学的一个新领域，除了评估身体活动和久坐行为之外。监测生活方式行为的人群调查应在体力活动监测中增加坐立时间的测量。此外，鼓励使用客观测量来捕捉久坐（坐着）和体力活动行为的范围，特别是在开始新的监测活动的低收入和中等收入国家。
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