Table 1 Characteristics of the sample, n (%)
From: Association between weight, weight perception, weight teasing and mental health among adolescents
|  |  | Total | Male | Female | χ2 | P |
|---|---|---|---|---|---|---|
School type | Junior middle school | 4367 (47.5) | 2287 (45.0) | 2080 (50.6) | 302.718 |  < 0.001 |
| Â | Senior middle school | 2682 (29.2) | 1268 (25.0) | 1414 (34.4) | Â | Â |
| Â | Vocational middle school | 2145 (23.3) | 1526 (30.0) | 619 (15.0) | Â | Â |
Live at school | Yes | 1496 (16.3) | 882 (17.4) | 614 (14.9) | 9.856 | 0.002 |
| Â | No | 7698 (83.7) | 4199 (82.6) | 3499 (85.1) | Â | Â |
Academic performance | Top quarter | 3267 (35.5) | 1864 (36.7) | 1403 (34.1) | 23.586 |  < 0.001 |
| Â | Middle | 4274 (46.5) | 2249 (44.2) | 2025 (49.2) | Â | Â |
| Â | Bottom quarter | 1653 (18.0) | 968 (19.1) | 685 (16.7) | Â | Â |
Pocket money |  < 200 CNY | 4804 (52.2) | 2684 (52.8) | 2120 (51.5) | 24.731 |  < 0.001 |
|  | 200–599 CNY | 2930 (31.9) | 1525 (30.0) | 1405 (34.2) |  |  |
|  |  ≥ 600 CNY | 1460 (15.9) | 872 (17.2) | 588 (14.3) |  |  |
BMI | Underweight | 841 (9.2) | 519 (10.2) | 322 (7.8) | 402.351 |  < 0.001 |
| Â | Normal | 5795 (63.0) | 2753 (54.2) | 3042 (74.0) | Â | Â |
| Â | Overweight/obese | 2558 (27.8) | 1809 (35.6) | 749 (18.2) | Â | Â |
Weight perception | Underweight | 1792 (19.5) | 1244 (24.5) | 548 (13.3) | 180.888 |  < 0.001 |
| Â | About the right weight | 3407 (37.0) | 1781 (35.0) | 1626 (39.6) | Â | Â |
| Â | Overweight | 3995 (43.5) | 2056 (40.5) | 1939 (47.1) | Â | Â |
Weight teasing | Never | 6393 (69.5) | 3640 (71.6) | 2753 (66.9) | 23.924 |  < 0.001 |
| Â | Less than once a year | 1270 (13.8) | 648 (12.8) | 622 (15.1) | Â | Â |
| Â | More than once a year | 1531 (16.7) | 793 (15.6) | 738 (18.0) | Â | Â |
Total | 9194 (100) | 5081 (55.3) | 4113 (44.7) | Â | Â | |