Table 4.
Regression analyses of individual physical characteristics, work- and health-related risk variables: univariate and multiple final adjusted†HR for low back pain during the marine training course
| Variable | Univariate | Final crude multivariable | Final adjusted multivariable* | ||||||
| HR | 95% CI | P value | HR | 95% CI | P value | HR | 95% CI | P value | |
| Physical characteristics | |||||||||
| Body weight (kg) | 1.01 | 0.99 to 1.03 | 0.441 | ||||||
| Body height≤1.80 (m) | 1.48 | 0.84 to 2.58 | 0.172 | 1.73 | 1.03 to 2.92 | 0.040 | 1.98 | 1.19 to 3.29 | 0.009 |
| Rated health/health history | |||||||||
| Mental distress (GHQ-12 Score) |
2.08 | 0.65 to 6.70 | 0.219 | ||||||
| Back pain; within 6 months prior to course start | 2.00 | 1.09 to 3.64 | 0.025 | 2.26 | 1.27 to 4.03 | 0.006 | 2.47 | 1.41 to 4.31 | <0.001 |
| Hip/knee pain; within 6 months prior to course start | 1.50 | 0.85 to 2.66 | 0.163 | ||||||
| Neck/shoulder pain; within 6 months prior to course start | 1.63 | 0.91 to 2.90 | 0.098 | ||||||
| Work-related | |||||||||
| Current work ability with regard to best ever | 1.69 | 0.97 to 2.94 | 0.064 | ||||||
| Direct from basic military training (within 3 months) | 1.08 | 0.62 to 1.91 | 0.779 | ||||||
| Physical training habits past 6 months | |||||||||
| Physical training; | |||||||||
| ≤2 sessions/week | 1.18 | 0.53 to 2.64 | 0.692 | ||||||
| 3–4 sessions/week | 1.00 | ||||||||
| ≥5 sessions/week | 1.29 | 0.70 to 2.37 | 0.418 | ||||||
| Muscular strength training; | |||||||||
| ≤1 sessions/week | 0.90 | 0.52 to 1.54 | 0.690 | ||||||
| 2–4 sessions/week | 1.00 | ||||||||
| ≥5 sessions/week | 1.27 | 0.58 to 2.78 | 0.542 | ||||||
| Aerobic fitness training; | |||||||||
| ≤1 session/week | 1.24 | 0.66 to 2.36 | 0.502 | ||||||
*Adjusted for confounding effect of sex.
GHQ, general health questionnaire.