Table 3.
Relationship between frequency of AS and associated factors
| Variables | Adequate sleep | χ2 (d.f. = 1) | Odds ratio | 95% Confidence Interval | |
| Higher | Lower | ||||
| n (%) | |||||
| Grader | |||||
| Middle school (7th-9th) | 246 (54.4%) | 206 (45.6%) | 47.49*** | 3.40 | 2.4~4.9 |
| High school (10th-12th) | 53 (26.0%) | 151 (74.0%) | |||
| Gender | |||||
| Boys | 159 (45.8%) | 188 (54.2%) | 0.02 | 1.02 | 0.7~1.4 |
| Girls | 140 (45.3%) | 169 (54.7%) | |||
| Family structure | |||||
| With both parents | 264 (45.7%) | 314 (54.3%) | 0.02 | 1.03 | 0.6~1.7 |
| Others | 35 (44.9%) | 43 (55.1%) | |||
| Family religion | |||||
| Yes | 196 (45.2) | 238 (54.8) | 0.09 | 1.05 | 0.8~1.5 |
| None | 103 (46.4) | 119 (53.6) | |||
| Living location | |||||
| Rural | 207 (45.6%) | 247 (54.4%) | 0.00 | 1.02 | 0.7~1.4 |
| Urban | 92 (45.5%) | 110 (54.5%) | |||
| Watching TV (weekday)1 | |||||
| Lower | 230 (44.3) | 289 (55.7) | 1.60 | 0.78 | 0.5~1.1 |
| Higher | 69 (50.4) | 68 (49.6) | |||
| Using Computer (weekday)2 | |||||
| Lower | 221 (45.2) | 268 (54.8) | 0.10 | 0.90 | 0.6~1.3 |
| Higher | 78 (46.7) | 89 (53.3) | |||
12Lower/higher frequency: watching TV or using computer is defined as below/above the average total hours on weekdays for the sample.