Description:
<jats:title>Abstract</jats:title>
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<jats:title>Background</jats:title>
<jats:p>Moderate-vigorous physical activity (MVPA) is an essential determinant of health for children. However 82% of children aged 11-17 years in Turkey are physically inactive. The objective of this study was to determine the prevalence of physical inactivity (PI) and sociodemographic and neighbourhood characteristics associated with PI among children aged 9-13 years.</jats:p>
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<jats:title>Methods</jats:title>
<jats:p>The population of this cross-sectional study was 5-7th grade students attending schools in a district of Istanbul. Two schools from urban and two from semi-urban localities were selected in order to capture different neighbourhood characteristics. Sample size was calculated as 344 assuming a difference of PI prevalence of 15% between neighbourhoods, an alpha error of 0.05, a power of 80%. Data were collected by child and parent questionnaires. PI was defined as &lt; 60 minutes MVPA per day within the previous week. Neighbourhood characteristics were evaluated as physical (walkability levels, structure of sidewalks, presence of yards/parks, traffic density) and social (characteristics of social networks, trust among neighbours). Factors associated with PI were analysed by logistic regression.</jats:p>
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<jats:title>Results</jats:title>
<jats:p>A total of 334 students participated with a response rate 96%. The median age was 11 years and 52.9% were girls. The prevalence of PI was 79.3% (95%CI: 75.0-83.7%). Neighbourhood characteristics were not associated with PI (p &gt; 0.05). PI was associated with ownership of mobile phones (OR: 1.96, 95%CI: 1.01-3.78), not being a member of a sports team (OR: 2.83, 95%CI: 1.21-6.58) and having ≤1 day of physical education classes at school (OR: 2.10, 95%CI: 1.08-4.09).</jats:p>
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<jats:title>Conclusions</jats:title>
<jats:p>The prevalence of PI is very high among schoolchildren. School-based interventions as motivating children to participate in sports teams and having physical education classes &gt;1 times per week could be achievable strategies to combat PI. There is a need to adapt objective methods for assessment of neighbourhood characteristics.</jats:p>
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<jats:title>Key messages</jats:title>
<jats:p>PI is a prevalent public health problem among school children in urban and semi-urban environments. The effectiveness of increasing structured physical activity levels at schools by utilizing sports teams and physical education classes should be evaluated in future studies.</jats:p>
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