Table 4

Multivariate association between questionnaire variables and injury risk among MP recruits
Variable Strata N Hazard ratio (95% CI) p-value
Men
Age <20.0 years 1080 1.00 Referent
20.0-24.9 years 623 1.21 (1.02-1.43) 0.03
25–29.9 years 90 1.17 (0.81-1.67) 0.40
≥30 years 38 2.29 (1.49-3.53) <0.01
Smoked ≥100 Cigarettes in Life No 1271 1.00 Referent
Yes 560 1.32 (1.12-1.56) <0.01
Physical Activity Before Basic Training Compared to Peers Much Less Active 90 1.46 (1.01-2.10) 0.05
Less Active 313 1.51 (1.18-1.94) <0.01
Average 439 1.09 (0.85-1.40) 0.49
More Active 637 0.84 (0.67-1.07) 0.16
Much More Active 352 1.00 Referent
Totally Recovered from Prior Injury No Prior Injury 1324 1.00 Referent
No 27 1.97 (1.16-3.37) 0.01
Yes 480 1.18 (0.99-1.41) 0.07
Women
Age <20.0 years 319 1.00 Referent
20.0-24.9 years 194 1.25 (1.00-1.55) 0.05
25–29.9 years 20 1.36 (0.77-2.39) 0.29
≥30 years 9 2.56 (1.19-5.49) 0.02
Smoked ≥100 Cigarettes in Life No 396 1.00 Referent
Yes 146 1.20 (0.95-1.51) 0.10
Time Running/Jogging before Basic Training ≤1 month 142 1.61 (1.14-2.26) <0.01
2–6 months 300 1.61 (1.18-2.20) <0.01
≤7 months 100 1.00 Referent
Gone ≥6 Months without Menstrual Cycle in Last Year No 494 1.00 Referent
Yes 44 1.66 (1.17-2.36) <0.01
No Cycles Yet 4 0.27 (0.04-1.92) 0.19

Knapik et al.

Knapik et al. BMC Musculoskeletal Disorders 2013 14:32   doi:10.1186/1471-2474-14-32

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