Table 1.
Unadjusted odds ratios for sedentary and physical activities and overweight among adolescents
| Sedentary and physical activities | Cases (n = 176) |
Controls (n = 704) |
OR (95% CI) | p value |
|---|---|---|---|---|
| Frequency % | Frequency % | |||
| Total sedentary time ≥ 4 h/day (more sedentary) | 170 (96.6) | 637 (90.5) | 2.9 (1.3–6.9) | 0.009 |
| Radio listening time ≥ 2 h/day | 163 (92.6) | 636 (90.3) | 1.4 (0.7–0.9) | 0.03 |
| TV watching time ≥ 2 h/day | 93 (52.8) | 248 (35.2) | 2.06 (1.5–2.9) | < 0.01 |
| Video/DVD time ≥ 2 h/day | 33 (18.8) | 78 (11.1) | 1.8 (1.2–2.9) | 0.006 |
| Computer working time ≥ 2 h/day | 23 (13.1) | 41 (5.8) | 2.4 (1.4–4.2) | 0.001 |
| Reading for fun time ≥ 2 h/day | 18 (10.2) | 11 (1.6) | 7.1 (3.3–15.5) | < 0.01 |
| Home work time ≥ 2 h/day | 58 (33.0) | 167 (23.7) | 1.6 (1.1–2.3) | 0.012 |
| Tuitions/extra class time ≥ 2 h/day | 21 (11.9) | 76 (10.8) | 1.2 (0.67–1.9) | 0.60 |
| Phone usage time ≥ 2 h/day | 8 (4.5) | 7 (1.0) | 4.7 (1.6–13.2) | 0.001 |
| Music doing time ≥ 2 h/day | 2 (1.1) | 7 (1.0) | 1.1 (0.23–5.6) | 0.80 |
| Insufficiently physical active | 117 (66.5) | 399 (56.7) | 1.5 (1.1–2.1) | 0.018 |
| Going to school by foot cycle ≤ 2 days/week | 103 (58.5) | 339 (48.2) | 1.5 (1.1–2.1) | 0.014 |
| No of sports clubs played for last 12 months—none | 69 (39.2) | 247 (35.1) | 1.2 (0.8–1.7) | 0.30 |
| Participated in sport clubs, aerobics, dancing classes for ≤ 2 days/week last 12 months | 154 (87.5) | 568 (80.7) | 1.7 (1.1–2.7) | 0.03 |
| Participated in school morning physical exercise programme ≤ 2 days/last week | 171 (97.2) | 654 (92.2) | 2.6 (1.1–6.7) | 0.014 |
OR, odds ratio; CI, confidence interval