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To investigate the associations between leisure screen time and theinsomnia symptoms among adolescents.
A random cluster sampling method was used to assess leisure screen time among adolescents aged 12-18 attending schools in Pidu District, Chengdu. Participants reported their screen time on school days and weekends via self-administered questionnaires. Insomnia symptoms were collected using the Insomnia Severity Index (ISI). Adolescents were categorized into two groups based on their ISI scores: the non-insomnia group (ISI score <7) and the insomnia group (ISI score ≥7). Logistic regression models, adjusted for multiple confounders, were used to estimate the association between leisure screen time and the occurrence of insomnia symptoms.
A total of 13 240 adolescents participated, comprising 6 581 boys (49.7%) and 6 659 girls (50.3%), with a mean age of 15.4 years (±1.57). Of these, 51.8% reported an average daily leisure screen time exceeding 2 h, and the prevalence of insomnia symptoms was 35.3%. After adjusting for all confounding factors, logistic regression analysis indicated that leisure screen time >2 h was a significant risk factor for insomnia symptoms (OR=1.13, 95%CI=1.03-1.23). Further analysis by quartiles of leisure screen time revealed that adolescents in Q3 (OR=1.15, 95%CI=1.02-1.28) and Q4 (OR=1.22, 95%CI=1.08-1.39) had significantly increased risks of insomnia, whereas no significant association was observed in the Q2 group. A clear dose-response relationship was observed between leisure screen time and insomnia (Ptrend<0.001). Subgroup analyses by sex, region, economic status, single child, and caretaker did not reveal significant interactions (Pinteraction>0.05).
Prolonged leisure screen time significantly increases the risk of insomnia symptoms among adolescents. Parents and schools should encourage physical activity and reduce electronic device usage to promote their well-being.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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