Table 3.
Poisson regression models for the risk of fatigue fractures in young Finnish men performing their compulsory military service
| Univariate IRR (95% CI) | MultivariateaIRR (95% CI) | |
|---|---|---|
| Age (y) of military service | 0.95 (0.72 to 1.26) | |
| Class A of service | 3.30 (0.45 to 23.94) | |
| BMI | 0.96 (0.88 to 1.05) | |
| Smoking | 0.68 (0.32 to 1.44) | |
| Comprehensive school only | 0.75 (0.41 to 1.40) | |
| Self-reported pre-military service high physical activity | 0.41 (0.20 to 0.85) | 0.41 (0.20 to 0.85) |
| Diseases and injuries | ||
| F00-F99 Mental and behavioural disorders | 0.45 (0.06 to 3.27) | |
| H00–H59 Diseases of the eyes and adnexa | 0.89 (0.45 to 1.76) | |
| J00–J99 Diseases of the respiratory system | 0.43 (0.13 to 1.40) | |
| L00–L99 Diseases of the skin and subcutaneous tissue | 0.40 (0.05 to 2.88) | |
| M00–M99 Diseases of the musculoskeletal system | 1.46 (0.57 to 3.70) | |
| Self-reported subjective symptoms on admission | ||
| Injuries | 0.90 (0.32 to 2.52) | |
| Symptoms of the musculoskeletal system | 0.25 (0.03 to 1.82) | |
| Respiratory symptoms | 0.48 (0.19 to 1.23) | |
| Mental symptoms | 2.09 (0.65 to 6.74) | |
| Headache | 2.38 (0.93 to 6.04) | |
aForward stepwise selection. Only those variables shown which entered the model