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Results of logistic regression analysis.
| Types of Lessons | OR a (95% CI) |
|---|---|
| No lessons | 1 |
| Sports club | 1.45 * (1.03–2.04) |
| Cram school | 0.67 ** (0.49–0.90) |
| Sports club and cram school | 0.85 (0.64–1.14) |
** p < 0.01, * p < 0.05. a OR: odds ratio, 95% CI: 95% confidence interval.
