Table 5.
Regression analyses of individual physical characteristics, work- and health-related risk variables: univariate and multiple final adjusted†HR for low back pain limiting work ability 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) | 1.00 | 0.96 to 1.04 | 0.991 | ||||||
| Body height ≤1.80 (m) | 2.20 | 0.96 to 5.03 | 0.062 | 3.04 | 1.35 to 6.86 | 0.007 | 4.48 | 2.01 to 9.97 | <0.001 |
| Rated health/health history | |||||||||
| Back Pain; within 6 months prior to course start | 2.48 | 1.04 to 5.91 | 0.040 | 4.47 | 1.80 to 11.11 | 0.001 | 3.58 | 1.44 to 8.90 | 0.006 |
| Hip/knee pain; within 6 months prior to course start | 1.15 | 0.41 to 3.23 | 0.784 | ||||||
| Neck/shoulder pain; within 6 months prior to course start | 2.79 | 1.18 to 6.57 | 0.019 | ||||||
| Work-related | |||||||||
| Current work ability with regard to best ever | 1.74 | 0.68 to 4.40 | 0.246 | ||||||
| Direct from basic military training (within 3 months) | 1.71 | 0.73 to 4.00 | 0.218 | ||||||
| Physical training habits past 6 months | |||||||||
| Physical training; | |||||||||
| ≤2 sessions/week | 1.87 | 0.78 to 4.49 | 0.161 | 3.23 | 1.41 to 7.40 | 0.006 | 2.96 | 1.19 to 7.39 | 0.020 |
| Muscular strength training; | |||||||||
| ≤1 sessions/week | 0.86 | 0.30 to 2.43 | 0.774 | ||||||
| 2–4 sessions/week | 1.00 | ||||||||
| ≥5 sessions/week | 1.82 | 0.79 to 4.22 | 0.161 | ||||||
| Aerobic fitness training; | |||||||||
| ≤1 sessions/week | 1.41 | 0.63 to 3.15 | 0.408 | ||||||
*Adjusted for confounding effect of sex and neck/shoulder pain previous to course start.