Table 3.
Risk factors for psychological and behavioral problems in the study.
| The SDQ scale | OR (95% CI) | P |
|---|---|---|
| Hyperactivity-inattention | ||
| Number of days with >60 min activity every week | ||
| 0 | Ref | |
| 1–2 days | 0.44 (0.24, 0.82) | 0.010 |
| >2 days | 0.56 (0.33, 0.94) | 0.027 |
| Peer problems | ||
| The location of the elementary school | ||
| Huangshi | Ref | |
| Wuhan | 2.36 (1.50, 3.70) | <0.001 |
| Grade | ||
| 2–3 | Ref | |
| 4–6 | 2.50 (1.46, 4.27) | 0.001 |
| Gender | ||
| Boy | Ref | |
| Girl | 0.60 (0.38, 0.97) | 0.036 |
| Prosocial behaviors | ||
| Grade | ||
| 2–3 | Ref | |
| 4–6 | 0.53 (0.37, 0.77) | 0.001 |
| Number of days with >60 min activity every week | ||
| 0 | Ref | |
| 1–2 days | 0.65 (0.41, 1.04) | 0.070 |
| >2 days | 0.55 (0.36, 0.85) | 0.006 |
| Emotional symptoms | ||
| Gender | ||
| Boy | Ref | |
| Girl | 1.69 (0.99, 2.89) | 0.053 |
| Anxious symptoms for parents | ||
| No | Ref | |
| Yes | 5.64 (2.18, 14.58) | <0.001 |
| Total difficulty | ||
| The location of the elementary school | ||
| Huangshi | Ref | |
| Wuhan | 1.65 (1.10, 2.48) | 0.015 |
| Anxious symptoms for parents | ||
| No | Ref | |
| Yes | 3.78 (1.56, 9.15) | 0.003 |
Abbreviations: CI: Confidence interval; OR: Odds ratio; SDQ, The Strengths and Difficulties Questionnaire.