Variables | Category | Males | Females | ||||
---|---|---|---|---|---|---|---|
Non-injured, n (%) | Injured, n (%) | p value | Non-injured, n (%) | Injured, n (%) | p value | ||
3540 (85.7) | 592 (14.3) | Â | 1432 (89.3) | 171 (10.7) | Â | ||
Grade | Elementary school | 2909 (85.9) | 478 (14.1) | 0.402 | 1017 (89.0) | 126 (11.0) | 0.467 |
Junior high school | 631 (84.7) | 114 (15.3) | Â | 415 (90.2) | 45 (9.8) | Â | |
BMI | Underweight | 2391 (85.1) | 418 (14.9) | 0.199 | 936 (89.1) | 114 (10.9) | 0.908 |
Normal weight | 1034 (86.5) | 161 (13.5) | Â | 474 (89.8) | 54 (10.2) | Â | |
Overweight | 115 (89.8) | 13 (10.2) | Â | 22 (88.0) | 3 (12.0) | Â | |
Sports | Baseball | 1260 (86.5) | 196 (13.5) | Â | 73 (92.2) | 5 (7.8) | Â |
Soccer | 992 (86.0) | 161 (14.0) | Â | 59 (92.2) | 5 (7.8) | Â | |
Volleyball | 115 (85.8) | 19 (14.2) | Â | 349 (87.5) | 50 (12.5) | Â | |
Basketball | 582 (85.2) | 101 (14.8) | Â | 501 (89.3) | 60 (10.7) | Â | |
Judo | 123 (82.6) | 26 (17.4) | Â | 52 (94.5) | 3 (5.5) | Â | |
Kendo | 215 (84.3) | 40 (15.7) | Â | 124 (87.9) | 17 (12.1) | Â | |
Karate | 117 (86.0) | 19 (14.0) | Â | 43 (91.5) | 4 (8.5) | Â | |
Handball | 15 (75.0) | 5 (25.0) | Â | 13 (92.9) | 1 (7.1) | Â | |
Tennis | 38 (80.9) | 9 (19.1) | Â | 58 (87.9) | 8 (12.1) | Â | |
Athletics | 38 (84.4) | 7 (15.6) | Â | 59 (86.8) | 9 (13.2) | Â | |
Table Tennis | 20 (80.0) | 5 (20.0) | Â | 37 (94.9) | 2 (5.1) | Â | |
Badminton | 25 (86.2) | 4 (13.8) | Â | 64 (91.4) | 6 (8.6) | Â | |
Contact sport | Non-contact | 121 (82.9) | 25 (17.1) | 0.554 | 218 (89.7) | 25 (10.3) | 0.796 |
Limited-contact | 1948 (86.1) | 314 (13.9) | Â | 920 (88.8) | 116 (11.2) | Â | |
Semi-contact | 339 (85.0) | 60 (15.0) | Â | 169 (89.9) | 21 (11.1) | Â | |
Full-contact | 1132 (85.4) | 193 (14.6) | Â | 125 (93.3) | 9 (6.7) | Â | |
Team level | Area competition | 2059 (86.3) | 328 (13.7) | 0.026 | 785 (89.9) | 88 (10.1) | 0.252 |
Prefectural competition | 1262 (85.7) | 210 (14.3) | Â | 490 (89.6) | 57 (10.4) | Â | |
Regional competition | 219 (80.2) | 54 (19.8) | Â | 157 (85.8) | 26 (14.2) | Â | |
Experience (years) | ≤1 | 1481 (86.2) | 237 (13.8) | 0.540 | 657 (90.1) | 72 (9.9) | 0.280 |
1 to 5 | 1653 (85.6) | 279 (14.4) | Â | 616 (88.0) | 84 (12.0) | Â | |
≥5 | 406 (84.2) | 76 (15.8) |  | 159 (91.4) | 15 (8.6) |  | |
Training days per week (days) | <3 | 2185 (86.6) | 337 (13.4) | 0.027 | 661 (89.2) | 80 (10.8) | 0.877 |
≥3 | 1355 (84.2) | 255 (15.8) |  | 771 (89.4) | 91 (10.6) |  | |
Enjoyment in playing sport | Yes | 3484 (85.8) | 575 (14.2) | 0.027 | 1396 (89.5) | 164 (10.5) | 0.227 |
No | 56 (76.7) | 17 (23.3) | Â | 36 (83.7) | 7 (16.3) | Â | |
The time for breaks | Sufficient | 3212 (86.3) | 511 (13.7) | 0.001 | 1261 (89.3) | 151 (10.7) | 0.925 |
Insufficient | 328 (80.2) | 81 (19.8) | Â | 171 (89.5) | 20 (10.5) | Â | |
Verbal abuse from coaches | No | 2841 (86.7) | 434 (13.3) | <0.001 | 1113 (89.9) | 125 (10.1) | 0.173 |
Yes | 699 (81.6) | 158 (18.4) | Â | 319 (87.4) | 46 (12.6) | Â | |
Physical punishment from coaches | No | 3116 (86.5) | 485 (13.5) | <0.001 | 1272 (89.5) | 149 (10.5) | 0.510 |
Yes | 424 (79.8) | 107 (20.2) | Â | 160 (87.9) | 22 (12.1) | Â | |
Screen time per day (hours) | <3 | 1189 (85.8) | 197 (14.2) | 0.426 | 583 (88.5) | 76 (11.5) | 0.231 |
3 to 5 | 1332 (86.2) | 213 (13.8) | Â | 504 (91.0) | 50 (9.0) | Â | |
≥5 | 1019 (84.8) | 182 (15.2) |  | 345 (88.5) | 45 (11.5) |  | |
Sleep time per day (hours) | ≤8.5 | 1126 (84.4) | 208 (15.6) | 0.277 | 599 (88.7) | 76 (11.3) | 0.723 |
8.5 to 9 | 729 (86.3) | 116 (13.7) | Â | 280 (88.9) | 35 (11.1) | Â | |
≥9 | 1685 (86.3) | 268 (13.7) |  | 553 (90.2) | 60 (9.8) |  |