Table 2 Comparisons of psychological symptom detection rates among Chinese adolescents by screen and exercise time (%)
Sex | Category | Group | N | Emotional symptoms | Behavioral symptoms | Social adaption difficulties | Psychological symptoms | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N (%) | χ2 | P | N (%) | χ2 | P | N (%) | χ2 | P | N (%) | χ2 | P | ||||
Boys | Screen time (h/d) | <1 | 1792 | 519 (29.0) | 7.69 | 0.02 | 488 (27.2) | 19.37 | < 0.001 | 325 (18.1) | 9.68 | 0.01 | 397 (22.2) | 6.63 | 0.04 |
1–2 | 1108 | 274 (24.7) | 288 (26.0) | 178 (16.1) | 223 (20.1) | ||||||||||
>2 | 700 | 208 (29.7) | 245 (35.0) | 153 (21.9) | 177 (25.3) | ||||||||||
Exercise time (min/d) | <30 | 1311 | 450 (34.3) | 43.66 | < 0.001 | 414 (31.6) | 10.90 | < 0.001 | 301 (23.0) | 31.21 | < 0.001 | 354 (27.0) | 28.29 | < 0.001 | |
30–60 | 1551 | 374 (24.1) | 405 (26.1) | 244 (15.7) | 300 (19.3) | ||||||||||
>60 | 738 | 177 (24.0) | 202 (27.4) | 111 (15.0) | 143 (19.4) | ||||||||||
Girls | Screen time (h/d) | <1 | 1906 | 521 (27.3) | 9.78 | 0.01 | 521 (27.3) | 10.26 | 0.01 | 316 (16.6) | 6.76 | 0.03 | 394 (20.7) | 7.11 | 0.03 |
1–2 | 1186 | 305 (25.7) | 279 (23.5) | 166 (14.0) | 224 (18.9) | ||||||||||
>2 | 508 | 168 (33.1) | 155 (30.5) | 95 (18.7) | 125 (24.6) | ||||||||||
Exercise time (min/d) | <30 | 2044 | 640 (31.3) | 41.78 | < 0.001 | 593 (29.0) | 20.23 | < 0.001 | 392 (19.2) | 38.72 | < 0.001 | 493 (24.1) | 42.58 | < 0.001 | |
30–60 | 1270 | 268 (21.1) | 280 (22.0) | 140 (11.0) | 187 (14.7) | ||||||||||
>60 | 286 | 86 (30.1) | 82 (28.7) | 45 (15.7) | 63 (22.0) | ||||||||||
Total | Screen time (h/d) | <1 | 3698 | 1040 (28.1) | 14.34 | < 0.001 | 1009 (27.3) | 28.11 | < 0.001 | 641 (17.3) | 17.31 | < 0.001 | 791 (21.4) | 14.31 | < 0.001 |
1–2 | 2294 | 579 (25.2) | 567 (24.7) | 344 (15.0) | 447 (19.5) | ||||||||||
>2 | 1208 | 376 (31.1) | 400 (33.1) | 248 (20.5) | 302 (25.0) | ||||||||||
Exercise time (min/d) | <30 | 3355 | 1090 (32.5) | 74.89 | < 0.001 | 1007 (30.0) | 25.34 | < 0.001 | 693 (20.7) | 56.58 | < 0.001 | 847 (25.2) | 59.22 | < 0.001 | |
30–60 | 2821 | 642 (22.8) | 685 (24.3) | 384 (13.6) | 487 (17.3) | ||||||||||
>60 | 1024 | 263 (25.7) | 284 (27.7) | 156 (15.2) | 206 (20.1) | ||||||||||