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BMC Public Health

, 14:744

Health behavior, health promotion and society


BackgroundStudies in western countries have revealed that excessive sedentary behavior is a major risk factor for physical inactivity in adolescents. This study was performed to investigate the association between sedentary behavior and physical inactivity in Chinese adolescents using a large-scale cross-sectional survey design.

MethodsThis study was part of the 2011 Chinese Youth Risk Behavior Survey. Between March and September 2011, 10,214 11–18-year-olds were recruited for survey participation in 18 schools in 10 cities in China. Demographic and socioeconomic characteristics, and the prevalences of physical inactivity and sedentary behaviors, were examined. Correlations between sedentary behavior and physical inactivity were analyzed using baseline logistic regression.

ResultsAmong the final 9,901 students, physical inactivity ~80% and sedentary behaviors television viewing, 43%; computer use, 30.2% were prevalent. More male than female students reported sedentary behaviors television viewing > 2 h: 5.5% vs. 3.9%; computer use > 2 h: 7.2% vs. 3.5%; both p < 0.05, but more males were physically active than females 25.1% vs.14.6%; p < 0.05. Television viewing was associated with lower odds of no physical activity No PA in males 0–2 h: adjusted odds ratio AOR = 0.81, 95% confidence interval CI = 0.68–0.96; >4 h: OR = 0.34, 95% CI = 0.18–0.64, but not in females. A similar pattern between insufficient physical activity and >4 h TV viewing AOR = 0.42, 95% CI = 0.23–0.76 and >4 h computer use AOR = 0.49, 95% CI = 0.30–0.78 was observed in males. In females, 0–2 h daily computer use was associated with higher odds of physical inactivity No PA: AOR = 1.42, 95% CI = 1.10–1.82; Insufficient PA: AOR = 1.58, 95% CI = 1.24–2.01, while TV viewing was not associated with No PA or Insufficient PA. The probability of physical inactivity significantly increased with grade and decreased with socioeconomic status.

ConclusionsPhysical inactivity and sedentary behaviors were prevalent in Chinese adolescents. Further support, including parental guidance and the provision of publicly accessible facilities, is necessary to encourage Chinese youths to engage sufficiently in physical activities.

KeywordsAdolescent Physical activity Computer Television AbbreviationsBMIBody mass index

CIConfidence interval

MVPAModerate to vigorous physical activity

OROdds ratio

PAPhysical activity

SESSocioeconomic status

YRBSSYouth Risk Behavior Surveillance System.

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Autor: You Chen - Zhonghui Zheng - Jinyao Yi - Shuqiao Yao


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