Intervention group n (%) | Control group n (%) | Crude difference % (95% CI) | Adjusted OR* (95% CI) | Adjusted risk ratio (95% CI) | |
Distance running event | |||||
10/10.55 km | 137 (30.1) | 130 (29.6) | 0.5 (−5.7 to 6.6) | 1.08 (0.80 to 1.45)† | 1.06 (0.87 to 1.29)† |
15/16.1 km | 88 (32.8) | 87 (32.7) | 0.1 (−8.1 to 8.3) | 1.08 (0.75 to 1.58)† | 1.06 (0.83 to 1.34)† |
Half marathon | 102 (35.1) | 107 (37.2) | −2.1 (−5.9 to 10.1) | 0.94 (0.66 to 1.33)† | 0.98 (0.79 to 1.20)† |
Marathon | 392 (38.9) | 393 (38.0) | 0.8 (−3.4 to 5.1) | 1.03 (0.86 to 1.24)† | 1.03 (0.92 to 1.14)† |
Sex | |||||
Male | 477 (36.7) | 466 (36.7) | 0.1 (−3.7 to 3.8) | 1.03 (0.87 to 1.21)‡ | 1.02 (0.92 to 1.26)‡ |
Female | 242 (33.4) | 251 (33.2) | 0.2 (−4.6 to 5.1) | 1.03 (0.83 to 1.28)‡ | 1.02 (0.89 to 1.18)‡ |
Running experience§ | |||||
≤1 year | 82 (39.0) | 90 (36.1) | 2.9 (−6.2 to 12.1) | 1.15 (0.78 to 1.69)‡ | 1.10 (0.87 to 1.39)‡ |
>1 year | 637 (35.2) | 627 (35.3) | −0.1 (−3.1 to 3.3) | 1.02 (0.89 to 1.17)‡ | 1.02 (0.93 to 1.11)‡ |
Previous RRI | |||||
Yes | 439 (44.8) | 438 (42.9) | 1.9 (−2.5 to 6.4) | 1.09 (0.91 to 1.30)¶ | 1.05 (0.95 to 1.16)¶ |
No | 280 (26.8) | 279 (27.7) | −0.9 (−3.0 to 4.8) | 0.96 (0.79 to 1.17)¶ | 0.97 (0.84 to 1.12)¶ |
Reported RRI at baseline | |||||
Yes | 166 (47.3) | 191 (46.4) | 0.9 (−6.3 to 8.2) | 1.05 (0.79 to 1.39)** | 1.02 (0.88 to 1.18)** |
No | 553 (33.1) | 526 (32.6) | 0.5 (−2.8 to 3.8) | 1.03 (0.89 to 1.19)** | 1.02 (0.92 to 1.13)** |
*Control group is reference.
†Adjusted for the variables age, BMI, RRI 12 months before baseline, weekly training frequency and weekly training distance.
‡Adjusted for the variables age, BMI, RRI 12 months before baseline and reported RRI at baseline.
§Running experience is missing for three participants.
¶Adjusted for the variables age and reported RRI at baseline.
**Adjusted for the variables age and BMI.
BMI, body mass index; km, kilometre; RRI, running-related injury.