Table 2.
Incidence of Injury per 1000 Hours for Portuguese Youth Soccer Players by Competitive Age Group (Mean [95% Confidence Interval])
| Injury | Age Group |
|||
| U-13 | U-15 | U-17 | U-19 | |
| Occurrence | ||||
| Match play | 2.0 (1.3, 5.4) | 6.1 (2.8, 9.4)a | 3.7 (0.4, 7.0)a | 7.1 (3.7, 10.4)a |
| Training | 0.5 (0.2, 1.2) | 0.7 (0.5, 1.4) | 1.1 (0.4, 1.8) | 1.2 (0.5, 1.9) |
| Severity | ||||
| Minimal | 0.2 (0.1, 0.4) | 0.3 (0.1, 0.7) | 0.2 (0.1, 0.4) | 0.2 (0.1, 0.5) |
| Mild | 0.3 (0.2, 0.7) | 0.1 (0.1, 0.4) | 0.3 (0.1, 0.8) | 0.2 (0.0, 0.5) |
| Moderate | 0.4 (0.2, 0.5) | 0.6 (0.4, 0.7) | 0.7 (0.1, 1.4) | 1.0 (0.2, 1.8) |
| Severe | 0.0 (0.0, 0.1) | 0.1 (0.0, 0.2) | 0.1 (0.0, 0.2) | 0.3 (0.0, 0.5)b |
| Cause | ||||
| Trauma | 0.4 (0.0, 0.9) | 0.6 (0.0, 1.2) | 1.0 (0.1, 2.1) | 1.1 (0.0, 2.1) |
| Overuse | 0.3 (0.3, 0.9) | 0.6 (0.1, 1.3) | 0.7 (0.6, 2.1) | 0.8 (0.0, 2.1) |
| Total | 0.6 (0.2, 1.5) | 1.1 (0.3, 2.0) | 1.4 (0.5, 2.2) | 1.7 (0.9, 2.5) |
a Indicates different from training (P < .05).
b Indicates different from U-13 (P < .05).