Table 2.
Rural-urban characteristics of the study participants.
| Participants | Characteristics | Rural (949) | Urban (641) | χ2 | p |
|---|---|---|---|---|---|
| Age (years) | Mean ± SD | 15.18 ± 1.27 | 14.98 ±1.16 | - | - |
| Sex | male | 448 (47.2%) | 318 (49.6%) | 0.884 | 0.347 |
| female | 501 (52.8%) | 323(50.4%) | - | - | |
| Place for meals | canteen | 548 (57.7%) | 101 (15.8%) | 507.891 | 0.000 |
| eatery | 275 (29.0%) | 108 (16.8%) | - | - | |
| at home | 126 (13.3%) | 432 (67.4%) | - | - | |
| Economic status | Wealthy (The family’s per capita income > 3000) | 186 (19.6%) | 329 (51.3%) | 213.068 | 0.000 |
| General (The family’s per capita income 500~3000) | 325(34.2%) | 202 (31.5%) | - | - | |
| poor (The family’s per capita income < 500) | 438 (46.2%) | 110(17.2%) | - | - | |
| Education of Father | Primary school or below | 216 (22.8%) | 46 (7.2%) | 229.139 | 0.000 |
| Junior High school | 502 (52.9%) | 202 (31.5%) | - | - | |
| Senior High school or above | 231 (24.3%) | 393 (61.3%) | - | - | |
| Education of Mother | Primary school or below | 403(42.5%) | 162(25.3%) | 94.776 | 0.000 |
| Junior High school | 382 (40.3%) | 238 (37.1%) | - | - | |
| Senior High school or above | 164(17.2%) | 241 (37.6%) | - | - | |
| Passive smoking | Yes | 509 (53.6%) | 338 (52.7%) | 0.126 | 0.723 |
| No | 440(46.4%) | 303 (47.3%) | - | - | |
| Strenuous exercise | <3 times/week | 493(51.9%) | 343 (53.5%) | 0.374 | 0.653 |
| >3 times/week | 456 (48.1%) | 298 (46.5%) | - | - | |
| Medium-intensity exercise | <3 times/week | 335 (35.3%) | 414 (64.6%) | 131.696 | 0.000 |
| >3 times/week | 614 (64.7%) | 227 (35.4%) | - | - | |
| Low-intensity exercise | <3 times/week | 312 (32.9%) | 396(61.8%) | 129.380 | 0.000 |
| >3 times/week | 637 (67.1%) | 245(38.2%) | - | - | |
| Nutritious supplements | Yes | 325 (34.2%) | 493 (76.9%) | 278.794 | 0.000 |
| No | 624 (65.8%) | 148(23.1%) | - | - |
Chi-square test and associated p values are provided. Data were presented as mean ± SD, or number of cases (%).