Abstract
This study investigates associations between after-school tutoring and availability of electronic devices with overweight/obesity among fifth-grade children in Ho Chi Minh City, Vietnam. A complex cross-sectional design was used to randomly select students and their parents in 8 public schools in Ho Chi Minh City in 2016. Students were categorized as overweight/obesity if their body mass index z score >+1 using the World Health Organization reference. Parents self-reported child's attendance in after-school tutoring and availability of electronic devices at home. Sampling weights were used to account for unequal selection probability and nonresponses in analyses. Students attending tutoring were more likely to be overweight/obesity (odds ratio = 1.59, P < .001). Overweight/obesity students spent on average about 1.5 hours/week more attending tutoring; most of these hours were during weekdays (P < .05). Students living in households with ≥2 types of devices were more likely to be overweight/obesity (odds ratio = 2.83, P < .001). Strategies to reduce study sitting time and the use of electronic devices may help with childhood overweight/obesity prevention.
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