Appendix Table 1.
Injury by Year, Level of Play, Injury by Time of Tennis Season, Injury Incidence, Injury Context, and Surgery Requirement
| Male (N = 68) | Female (N = 108) | Total (N = 176) | P Value | |
|---|---|---|---|---|
| Year | .040∗ | |||
| 2014-2015 | 10 (14.7%) | 25 (23.1%) | 35 (19.9%) | |
| 2015-2016 | 13 (19.1%) | 34 (31.5%) | 47 (26.7%) | |
| 2016-2017 | 22 (32.4%) | 19 (17.6%) | 41 (23.3%) | |
| 2017-2018 | 23 (33.8%) | 30 (27.8%) | 53 (30.1%) | |
| Level of play | .341† | |||
| Varsity | 60 (88.2%) | 85 (78.7%) | 145 (82.4%) | |
| Junior varsity | 7 (10.3%) | 16 (14.8%) | 23 (13.1%) | |
| Freshman | 0 (0.0%) | 1 (0.9%) | 1 (0.6%) | |
| Combined (practice/competition) | 1 (1.5%) | 6 (5.6%) | 7 (4.0%) | |
| Tennis season | .332† | |||
| N-Miss | 1 | 0 | 1 | |
| Preseason | 11 (16.4%) | 28 (25.9%) | 39 (22.3%) | |
| Regular season | 54 (80.6%) | 78 (72.2%) | 132 (75.4%) | |
| Postseason | 2 (3.0%) | 2 (1.9%) | 3 (2.3%) | |
| New or recurrent injury | .733∗ | |||
| N-Miss | 0 | 2 | 2 | |
| Recurrent injury | 9 (13.2%) | 16 (15.1%) | 25 (14.4%) | |
| New injury | 59 (86.8%) | 90 (84.9%) | 149 (5.6%) | |
| Athletic exposure | .310∗ | |||
| Competition | 33 (48.5%) | 44 (40.7%) | 77 (43.8%) | |
| Practice | 35 (51.5%) | 64 (59.3%) | 99 (56.2%) | |
| Time of injury during practice | .133† | |||
| N-Miss | 33 | 47 | 80 | |
| First half hour | 2 (5.7%) | 13 (21.3%) | 15 (15.6%) | |
| Second half hour | 11 (31.4%) | 11 (18.0%) | 22 (22.9%) | |
| 1-2 h into practice | 14 (40.0%) | 27 (44.3%) | 41 (42.7%) | |
| >2 h into practice | 2 (5.7%) | 1 (1.6%) | 3 (3.1%) | |
| Unknown | 6 (17.1%) | 9 (14.8%) | 15 (15.6%) | |
| Time point in competition | .192† | |||
| N-Miss | 39 | 68 | 107 | |
| Warm-up | 1 (3.4%) | 0 (0.0%) | 1 (1.4%) | |
| First set | 4 (13.8%) | 8 (20.0%) | 12 (17.4%) | |
| Second set | 12 (41.4%) | 12 (30.0%) | 24 (34.8%) | |
| Third set | 2 (6.9%) | 9 (22.5%) | 11 (15.9%) | |
| Other | 0 (0.0%) | 2 (5.0%) | 2 (2.9%) | |
| Unknown | 10 (34.5%) | 8 (22.5%) | 19 (27.5%) | |
| General play | 17 (27.4%) | 35 (34.7%) | 52 (31.9%) | |
| Other | 2 (3.2%) | 0 (0.0%) | 2 (1.2%) | |
| Unknown | 7 (11.3%) | 9 (8.9%) | 16 (9.8%) | |
| Chasing/running after/to hit ball | 19 (30.6%) | 28 (27.7%) | 47 (28.8%) | |
| Forehand ground stroke/service return | 2 (3.2%) | 4 (4.0%) | 6 (3.7%) | |
| One-handed backhand ground stroke/service return | 3 (4.8%) | 1 (1.0%) | 4 (2.5%) | |
| Two-handed backhand ground stroke/service return | 0 (0.0%) | 2 (2.0%) | 2 (1.2%) | |
| Forehand volley | 0 (0.0%) | 2 (2.0%) | 2 (1.2%) | |
| Two-handed backhand volley | 2 (3.2%) | 0 (0.0%) | 2 (1.2%) | |
| Serve | 5 (8.1%) | 8 (7.9%) | 13 (8.0%) | |
| During what type of play/practice did injury occur | .086† | |||
| N-Miss | 5 | 9 | 14 | |
| Competition singles play | 20 (31.7%) | 29 (29.3%) | 49 (30.2%) | |
| Competition doubles play | 12 (19.0%) | 13 (13.1%) | 25 (15.4%) | |
| Singles play during practice | 10 (15.9%) | 19 (19.2%) | 29 (17.9%) | |
| Doubles play during practice | 3 (4.8%) | 5 (5.1%) | 8 (4.9%) | |
| Skills drills during practice | 6 (9.5%) | 24 (24.2%) | 30 (18.5%) | |
| Other | 1 (1.6%) | 3 (3.0%) | 4 (2.5%) | |
| Unknown | 11 (17.5%) | 6 (6.1%) | 17 (10.5%) | |
| Site of competition/performance | .930† | |||
| N-Miss | 36 | 64 | 100 | |
| Home | 18 (56.2%) | 23 (52.3%) | 41 (53.9%) | |
| Away | 12 (37.5%) | 19 (43.2%) | 31 (40.8%) | |
| Neutral site | 2 (6.2%) | 2 (4.5%) | 4 (5.3%) | |
| Did injury require surgery | .154† | |||
| N-Miss | 1 | 5 | 6 | |
| No | 67 (100.0%) | 99 (96.1%) | 166 (97.6%) | |
| Yes | 0 (0.0%) | 4 (3.9%) | 4 (2.4%) |
∗
Pearson χ2 test.
†
Fisher’s exact test for count data.