Number (% of total) of weeks at risk included in the analysis by increase in handball load groups* and baseline factors in 671 youth handball players (14 684 weeks at risk)
| Exposure groups of handball load* | ||||||
|---|---|---|---|---|---|---|
| <20% | 20–60% | >60% | <−2 SD | 4 weeks | Total | |
| Sex | ||||||
| Boys (n=367) | 3854 (26) | 1317 (9) | 1295 (9) | 1279 (9) | 165 (1) | 7910 (54) |
| Girls (n=304) | 3407 (23) | 1223 (8) | 944 (6) | 1072 (7) | 128 (1) | 6774 (46) |
| Age group | ||||||
| U16 (n=239) | 2710 (18) | 901 (6) | 796 (5) | 113 (1) | 842 (6) | 5362 (37) |
| U18 (n=432) | 4551 (31) | 1639 (11) | 1443 (10) | 180 (1) | 1509 (10) | 9322 (63) |
| Player position | ||||||
| Back players (n=303) | 1831 (12) | 639 (4) | 560 (4) | 70 (0.5) | 578 (4) | 3678 (25) |
| Wing players (n=168) | 3152 (21) | 1221 (8) | 973 (7) | 130 (1) | 1061 (7) | 6437 (44) |
| Line players (n=102) | 1194 (8) | 432 (3) | 389 (3) | 40 (0) | 357 (2) | 2412 (16) |
| Goal keepers (n=97) | 1084 (7) | 348 (2) | 317 (2) | 53 (0.5) | 355 (2) | 2157 (15) |
| History of shoulder injury | ||||||
| Yes (n=43) | 466 (3) | 172 (1) | 145 (1) | 16 (0) | 148 (1) | 947 (6) |
| No (n=628) | 6795 (46) | 2368 (16) | 2094 (14) | 277 (2) | 2203 (15) | 13 737 (94) |
*See the text for definition.
−2 SD, weeks in which the 4-week average handball load was below −2 SDs from the mean; 4 weeks, the first 4 weeks of study, increase in handball load calculations not possible.