Table 2.
Crude Analysis on Different Exposures to Injury: cIRD for Running Injury After 500 km According to Exposure Variables a
| Variable of Interest | cIRD at 500 km | Standard Error | 95% CI | P Value |
|---|---|---|---|---|
| Sex | ||||
| Females (ref) | 0 | |||
| Males | −4.4% | 5.5 | −15.2%; 6.4% | .42 |
| Age | ||||
| 18-30 y | −1.6% | 5.5 | −12.3%; 9.2% | .77 |
| 30-45 y (ref) | 0 | |||
| 45-65 y | 14.7% | 8.6 | −2.1%; 31.5% | .08 |
| χ2 = 0.14b | ||||
| BMI | ||||
| <20 kg/m2 | −14.1% | 9.0 | −31.6%; 3.5% | .12 |
| 20-25 kg/m2 (ref) | 0 | |||
| 25-30 kg/m2 | 2.7% | 6.6 | −10.2%; 15.7% | .68 |
| >30 kg/m2 | 10.3% | 7.1 | −3.7%; 24.3% | .15 |
| χ2 = 0.06b | ||||
| TASRI | ||||
| Type B behavior (ref) | 0 | |||
| Type A behavior | −11.9% | 5.9 | −23.3%; −0.5% | .04 |
| Running experience | ||||
| Experienced (ref) | 0 | |||
| No running experience | 6.0% | 5.8 | −5.4%; 17.3% | .30 |
| Sports activity | ||||
| No (ref) | 0 | |||
| Yes, with axial load | −0.7% | 7.0 | −14.3%; 12.8% | .92 |
| Yes, without axial load | −2.4% | 8.4 | −18.9%; 14.2% | .78 |
| χ2 = 0.96b | ||||
| Previous RRI | ||||
| No (ref) | 0 | |||
| Yes | 5.2% | 7.2 | −8.9%; 19.3% | .47 |
| Previous non-RRI | ||||
| No (ref) | 0 | |||
| Yes | 11.1% | 5.8 | −0.2%; 22.4% | .05 |
acIRD, crude cumulative injury risk difference; BMI, body mass index, TASRI, Type A Self-Rating Inventory; CI, confidence interval; ref, reference group.
bProbability calculated based on a Wald test across categories.