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Table 5 Univariate associations between injury riska and questionnaire variables

From: Injury rates and injury risk factors among federal bureau of investigation new agent trainees

Variable Category Variable Strata Men Women
    N Injured(%) Hazard Ratios(95%CI)from CoxRegressions p-value(from WaldStatistic) N Injured(%) Hazard Ratios(95%CI) fromCox Regressions p-value(from WaldStatistic)
Tobacco Use Smoked 100 Cigarettes in Lifetime No 352 36.9 1.00 Referent 90 41.1 1.00 Referent
   Yes 74 25.7 0.63 (0.40-1.03) 0.07 15 46.7 1.17 (0.52-2.61) 0.71
  Age Smoked First Cigarette NeverSmoked 244 41.4 1.00 Referent 64 35.9 1.00 Referent
   6-17 years 116 26.7 0.56 (0.37-0.84) <0.01 23 52.2 1.65 (0.82-3.32) 0.16
   ≥18 years 66 25.8 0.56 (0.34-0.94) 0.03 18 50.0 1.39 (0.65-3.01) 0.40
  Smoked in Last 30 Days No 413 34.9 1.00 Referent 102 42.2 1.00 Referent
   Yes 13 38.5 1.04 (0.42-2.56) 0.92 3 33.3 0.69 (0.09-4.97) 0.71
  Smokeless Tobacco Use Last 30 Days No 402 35.1 1.00 Referent 104 42.3 1.00 Referent
   Yes 24 33.3 0.92 (0.45-1.88) 0.82 1 0.0 ----- -----
Physical Activity Self Rating of Physical Activity Less Active 6 83.3 4.60 (1.88-11.26) <0.01 3 66.7 2.18 (0.53-9.06) 0.28
   About the same 30 26.7 0.75 (0.37-1.52) 0.42 12 33.3 0.69 (0.25-1.94) 0.48
   More Active 390 34.9 1.00 Referent 90 42.2 1.00 Referent
  Frequency of Aerobic Exercise in Last 2 Months ≤ 1 time/week 2 100.0 5.96 (1.44-24.69) 0.01 0 --- ----- -----
   2-4 times/week 264 31.4 0.75 (0.54-1.03) 0.08 56 44.6 1.14 (0.63-2.07) 0.67
   ≥5 times/week 160 40.0 1.00 Referent 49 38.8 1.00 Referent
  Duration of Aerobic Exercise Last 2 Months 0-30 minutes 84 34.5 0.73 (0.45-1.19) 0.02 9 44.4 0.89 (0.29-2.70) 0.83
   31-60 minutes 257 32.3 0.70 (0.48-1.03) 0.07 68 38.2 0.77 (0.40-1.45) 0.40
   ≥61 minutes 85 43.5 1.00 Referent 28 50.0 1.00 Referent
  Frequency of Weight Training in Last 2 Months ≤ 1 time/week 104 40.4 1.40 (0.78-2.52) 0.26 24 41.7 0.90 (0.25-3.28) 0.88
   2-4 times/week 275 33.5 1.06 (0.61-1.83) 0.84 74 41.9 0.88 (0.27-2.89) 0.84
   ≥5 times/week 47 31.9 1.00 Referent 7 42.9 1.00 Referent
  Duration of Weight Training in Last 2 Months 0-30 minutes 123 33.3 0.80 (0.49-1.31) 0.38 42 40.5 0.46 (0.19-1.10) 0.08
   31-60 minutes 241 34.0 0.78 (0.50-1.22) 0.28 53 37.7 0.38 (0.16-0.90) 0.03
   ≥61 minutes 62 41.9 1.00 Referent 10 70.0 1.00 Referent
  Frequency of Playing Sports Last 2 Months ≤ 1 time/week 376 35.4 0.61 (0.09-4.36) 0.62 91 40.7 0.76 (0.34-1.71) 0.51
   2-4 times/week 48 31.3 0.50 (0.07-3.82) 0.51 14 50.0 1.00 Referent
   ≥5 times/week 2 50.0 1.00 Referent 0 --- ----- -----
  Duration of Sports in Last 30 Days 0-30 minutes 253 36.8 1.01 (0.64-1.59) 0.97 59 42.4 0.85 (0.37-1.97) 0.71
   31-60 minutes 110 30.0 0.79 (0.46-1.35) 0.39 32 37.5 0.71 (0.28-1.80) 0.48
   ≥61 minutes 63 36.5 1.00 Referent 14 50.0 1.00 Referent
Prior Injury Prior Lower Limb Injury No 167 29.3 1.00 Referent 40 42.5 1.00 Referent
   Yes 259 38.6 1.45 (1.03-2.04) 0.03 65 41.5 1.07 (0.59-1.97) 0.82
  Lower Limb Injury Prevented Normal Physical Activity for ≥1 week No Injury 167 29.3 1.00 Referent 40 42.5 1.00 Referent
   No 41 34.1 1.17 (0.65-2.12) 0.62 10 30.0 0.73 (0.22-2.50) 0.62
   Yes 218 39.4 1.51 (1.06-2.14) 0.02 55 43.6 1.14 (0.61-2.12) 0.68
  Returned to Normal Physical Activity Since Lower Limb Injury No Injury 168 29.8 1.00 Referent 40 42.5 1.00 Referent
   No 14 64.3 2.97 (1.46-6.05) <0.01 4 50.0 1.29 (0.30-5.61) 0.73
   Yes 244 36.9 1.35 (0.95-1.91) 0.09 61 41.0 1.06 (0.57-1.96) 0.86
  Injured Upper Limb No 248 31.0 1.00 Referent 73 41.1 1.00 Referent
   Yes 178 40.4 1.38 (1.00-1.88) 0.05 32 43.8 1.04 (0.55-1.97) 0.90
  Upper Limb Injury Prevented Normal Physical Activity for ≥1 Week No Injury 248 31.0 1.00 Referent 73 41.1 1.00 Referent
   No 34 35.3 1.13 (0.62-2.08) 0.70 9 33.3 0.88 (0.27-2.88) 0.83
   Yes 144 41.7 1.43 (1.02-2.00) 0.04 23 47.8 1.10 (0.55-2.20) 0.79
  Returned to Normal Physical Activity Since Upper Limb Injury No Injury 247 30.8 1.00 Referent 73 41.1 1.09 (0.58-2.05) 0.97
   No 11 72.7 2.93 (1.41-6.08) <0.01 1 0.0 ----- -----
   Yes 168 38.7 1.31 (0.94-1.83) 0.11 31 45.2 1.00 Referent
Pain Limiting Activity Have Foot Pain Limiting Activity at Times No 363 32.5 1.00 Referent 81 39.5 1.00 Referent
   Yes 63 49.2 1.64 (1.10-2.44) 0.01 24 50.0 1.46 (0.75-2.84) 0.27
  Have Knee Pain Limiting Activity at Times No 313 31.3 1.00 Referent 82 41.5 1.00 Referent
   Yes 113 45.1 1.67 (1.19-2.34) <0.01 23 43.5 1.24 (0.61-2.51) 0.55
  Have Back Pain Limiting Activity at Times No 341 32.8 1.00 Referent 84 35.7 1.00 Referent
   Yes 85 43.5 1.33 (0.92-1.93) 0.13 21 66.7 2.33 (1.23-4.40) <0.01
Menstrual History Age of Menarche 8-11 Years      9 22.2 0.43 (0.10-1.77) 0.24
   12-14 Years      76 46.1 1.00 Referent
   ≥15 Years      19 31.6 0.61 (0.26-1.45) 0.26
  Menstrual Periods Last Year 1-10      20 40.0 0.85 (0.40-1.84) 0.69
   11-13      84 41.7 1.00 Referent
  Gone ≥6 Months without Menstrual Cycle No      102 40.2 1.00 Referent
   Yes      2 100.0 2.84(0.69-11.77) 0.15
  Used Birth Control in Past 12 Months No      47 48.9 1.52 (0.84-2.77) 0.17
   Yes      57 35.1 1.00 Referent
  Used Hormonal Therapy in Past 12 Months No      97 41.2 0.88 (0.27-2.85) 0.83
   Yes      7 42.9 1.00 Referent
  Ever Pregnancy No      90 40.0 1.00 Referent
   Yes      12 41.7 1.02 (0.40-2.61) 0.96
  1. aAny injury (overuse and traumatic)