Table 2

 Incidence (injuries/1000 player training hours) of training injuries on artificial turf and grass in male and female players as a function of injury severity

Injury severityMale playersFemale players
Incidence (95% CI)Incidence ratio*(95% CI)p Value(z test)Incidence (95% CI)Incidence ratio*(95% CI)p Value(z test)
Artificial turfGrassArtificial turfGrass
*Incidence ratio values are based on grass as the reference.
†Includes season ending injuries.
All injuries3.34 (2.90 to 3.86)3.01 (2.79 to 3.26)1.11 (0.94 to 1.31)0.212.60 (2.17 to 3.10)2.79 (2.59 to 3.02)0.93 (0.77 to 1.13)0.46
Minimal (1–3 days)1.03 (0.79 to 1.33)1.27 (1.13 to 1.44)0.81 (0.61 to 1.07)0.141.04 (0.79 to 1.38)0.81 (0.70 to 0.93)1.29 (0.94 to 1.76)0.11
Mild (4–7 days)0.97 (0.75 to 1.3)0.62 (0.52 to 0.73)1.58 (1.15 to 2.16)<0.010.36 (0.22 to 0.58)0.68 (0.58 to 0.80)0.53 (0.32 to 0.88)0.01
Moderate (8–28 days)0.85 (0.64 to 1.1)0.59 (0.49 to 0.70)1.44 (1.03 to 2.01)0.030.62 (0.43 to 0.89)0.67 (0.57 to 0.78)0.92 (0.62 to 1.37)0.70
Severe (>28 days)†0.41 (0.27 to 0.61)0.52 (0.43 to 0.62)0.79 (0.50 to 1.23)0.300.49 (0.33 to 0.74)0.54 (0.45 to 0.64)0.91 (0.58 to 1.41)0.66