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Table 4 Univariate associations between injury riska and age, physical characteristics, and physical fitness

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

Variable Men Women
  Strata N Injured(%) Hazard Ratios (95%CI) from Cox Regressions p-value(from Wald statistic) Strata N Injured(%) Hazard Ratios(95%CI) fromCox Regressions p-value(from Waldstatistic)
Age 24.4-29.9 Years 188 26.6 1.00 Referent 24.1-29.9 years 60 36.7 1.00 Referent
  30.0-38.6 Years 238 41.6 1.83 (1.30-2.57) <0.01 30.0-37.0 years 45 48.9 1.52 (0.84-2.75) 0.16
Height 144-175 cm 123 35.0 1.02 (0.69-1.51) 0.93 147-162 cm 39 46.2 1.49 (0.72-3.10) 0.28
  176-178 cm 73 30.1 0.79 (0.48-1.28) 0.34 163-168 cm 31 45.2 1.45 (0.67-3.14) 0.35
  179-180 cm 65 38.5 1.10 (0.69-1.75) 0.70 169-180 cm 35 34.3 1.00 Referent
  181-205 cm 165 35.8 1.00 Referent      
Body Mass 51.8-75.9 kg 109 33.9 1.00 Referent 47.7-56.8 kg 35 42.9 1.00 Referent
  76.0-81.8 kg 127 33.1 0.98 (0.61-1.57) 0.91 56.9-63.6 kg 35 45.7 1.15 (0.57-2.33) 0.70
  81.9-88.6 kg 99 32.3 0.98 (0.61-1.57) 0.92 63.7-90.9 kg 35 37.1 0.91 (0.43-1.91) 0.80
  88.7-113.6 kg 91 41.8 1.24 (0.79-1.95) 0.35      
Body Mass Index 16.51-23.74 kg/m2 108 34.3 1.00 Referent 18.25-21.26 kg/m2 37 43.2 1.00 Referent
  23.75-25.11 kg/m2 110 25.5 0.74 (0.46-1.22) 0.24 21.27-23.30 kg/m2 34 44.1 1.13 (0.56-2.29) 0.73
  25.12-26.63 kg/m2 103 48.5 1.54 (1.00-2.36) 0.05 23.31-29.54 kg/m2 34 38.2 0.93 (0.45-1.94) 0.85
  26.64-38.74 kg/m2 105 32.4 0.95 (0.60-1.52) 0.84      
Body Mass Index 16.5-24.99 kg/m2 191 30.4 1.00 Referent 16.5-24.99 kg/m2 94 42.6 1.00 Referent
  25.00-29.99 kg/m2 223 36.3 1.18 (0.89-1.92) 0.26 25.00-29.99 kg/m2 11 36.4 0.92 (0.33-2.57) 0.87
  ≥ 30 kg/m2 12 8.3 0.24 (0.03-1.72) 0.16 ≥ 30 kg/m2 0 ----- ----- -----
Push-Ups 1-31 repetitions 104 37.5 1.20 (0.76-1.91) 0.44 0-13 repetitions 36 50.0 1.38 (0.67-2.81) 0.38
  32-36 repetitions 112 40.2 1.38 (0.88-2.16) 0.16 14-20 repetitions 35 37.1 0.95 (0.44-2.04) 0.89
  37-42 repetitions 106 30.2 0.97 (0.60-1.58) 0.91 21-39 repetitions 34 38.2 1.00 Referent
  43-71 repetitions 104 31.7 1.00 Referent      
Sit-Ups 28-40 repetition 97 42.7 1.32 (0.83-2.09) 0.23 26-40 repetition 38 42.1 1.28 (0.61-2.71) 0.52
  41-44 repetitions 132 34.0 1.05 (0.65-1.68) 0.84 41-44 repetitions 34 47.1 1.44 (0.68-3.05) 0.34
  45-47 repetitions 101 29.5 0.84 (0.53-1.34) 0.46 45-51 repetitions 33 36.4 1.00 Referent
  48-59 repetitions 96 35.6 1.00 Referent      
300-Meter Sprint 40-44 seconds 123 28.5 1.00 Referent 46-55 seconds 42 35.7 1.00 Referent
  45-46 seconds 132 34.1 1.23 (0.79-1.91) 0.36 56-58 seconds 41 39.0 1.17 (0.58-2.37) 0.66
  47-48 seconds 108 39.8 1.48 (0.95-2.32) 0.08 59-62 seconds 22 59.1 2.23 (1.06-4.70) 0.04
  49-55 seconds 63 41.3 1.71 (1.03-2.84) 0.04      
1.5-Mile Run 8.18-10.35 min 108 25.9 1.00 Referent 10.05-12.06 min 35 40.0 1.00 Referent
  10.36-11.10 min 107 30.8 1.24 (0.75-2.05) 0.41 12.07-12.95 min 35 37.1 0.90 (0.42-1.92) 0.80
  11.11-11.64 min 104 37.5 1.60 (0.99-2.61) 0.06 12.96-14.92 min 35 62.9 1.95 (1.00-3.80) 0.05
  11.65-15.02 min 106 45.3 2.06 (1.30-3.29) <0.01      
PhysicalFitnessTest Score 1-11 points 114 43.0 1.73 (1.09-2.75) 0.02 2-10 points 38 47.4 2.04 (1.00-4.14) 0.05
  12-14 points 107 30.8 1.15 (0.70-1.91) 0.58 11-14 points 32 43.8 1.77 (0.84-3.71) 0.13
  15-18 points 108 36.1 1.35 (0.82-2.17) 0.24 15-27 points 35 34.3 1.00 Referent
  19-37 points 97 28.9 1.00 Referent      
Pull-Ups 0-4 repetitions 94 41.5 1.12 (0.72-1.75) 0.62 0 repetitions 78 43.6 1.17 (0.58-2.37) 0.66
  5-8 repetitions 138 33.3 0.85 (0.55-1.31) 0.46 1-12 repetitions 27 37.0 1.00 Referent
  9-11 repetitions 92 27.2 0.64 (0.39-1.06) 0.08      
  12-22 repetitions 100 38.0 1.00 Referent      
  1. aAny injury (overuse and traumatic)