Table 3

Risk-adjusted length of stay

N=5302Coefficient (95% CI)P value
KSMC1.0Reference
Alfred−4.40 (3.95 to 4.86)<0.001
Glasgow Coma Score motor on arrival to the KSMC
 Obeys command1.0Reference
 No movement2.07 (1.01 to 3.03)<0.001
 Extension to pain2.68 (−0.19 to 5.54)0.068
 Flexion to pain15.79 (13.28 to 18.29)<0.001
 Withdraws to pain1.43 (−0.77 to 3.63)0.202
 Localises to pain1.55 (0.26 to 2.83)0.018
ISS categories
 <121.0Reference
 12–250.13 (−0.48 to 0.73)0.681
 26–402.06 (0.68 to 3.43)0.003
 >403.43 (0.84 to 6.03)0.009
Age at injury event (years)
 15–241.0Reference
 25–400.06 (−0.45 to 0.56)0.824
 41–600.37 (−0.16 to 0.89)0.170
 61–701.04 (0.35 to 1.73)0.003
 71–801.74 (1.04 to 2.43)<0.001
 81+2.10 (1.40 to 2.80)<0.001
Chest injury severity
 No chest injury1.0Reference
 Minor−0.12 (−1.00 to 0.76)0.796
 Moderate0.91 (0.22 to 1.61)0.010
 Serious1.69 (1.06 to 2.32)<0.001
 Severe4.35 (3.10 to 5.60)<0.001
 Critical3.35 (0.92 to 5.79)0.007
Abdominal injury severity
 No abdominal injury1.0Reference
 Minor0.43 (−0.41 to 1.28)0.313
 Moderate1.83 (0.89 to 2.77)<0.001
 Serious2.40 (0.96 to 3.85)0.001
 Severe5.37 (3.86 to 6.88)<0.001
 Critical4.68 (1.22 to 8.14)0.008
Spinal injury severity
 No spinal injury1.0Reference
 Minor1.40 (−0.38 to 3.18)0.123
 Moderate1.69 (1.24 to 2.13)<0.001
 Serious2.84 (2.14 to 3.54)<0.001
 Severe8.80 (6.61 to 10.99)<0.001
 Critical9.97 (7.63 to 12.32)<0.001
 Maximal−5.53 (−18.12 to 7.06)0.389
Upper limb injury severity
 No upper limb injury1.0Reference
 Minor−0.05 (−0.64 to 0.54)0.871
 Moderate1.14 (0.68 to 1.59)<0.001
 Serious4.26 (2.39 to 6.12)<0.001
 Severe2.23 (−6.53 to 10.99)0.617
Lower limb injury severity
 No lower limb injury1.0Reference
 Minor−0.07 (−0.65 to 0.51)0.814
 Moderate2.45 (1.93 to 2.97)<0.001
 Serious5.30 (4.72 to 5.89)<0.001
 Severe7.88 (6.25 to 9.50)<0.001
 Critical6.28 (3.57 to 8.98)<0.001
Other injury or burns severity
 No other or burns injury1.0Reference
 Minor−0.15 (−1.42 to 1.12)0.821
 Moderate3.62 (0.05 to 7.20)0.047
 Serious3.53 (0.19 to 6.87)0.038
 Severe14.87 (7.69 to 22.05)<0.001
 Critical0.41 (−2.98 to 3.80)0.814
 Maximal−5.50 (−18.11 to 7.12)0.393
Head injury severity
 No head injury1.0Reference
 Minor0.05 (−0.58 to 0.68)0.879
 Moderate0.31 (−0.35 to 0.96)0.361
 Serious1.63 (0.93 to 2.34)<0.001
 Severe4.35 (3.27 to 5.43)<0.001
 Critical7.09 (5.53 to 8.65)<0.001
  • ISS, Injury Severity Score; KSMC, King Saud Medical City.