Table 2

Bivariate analysis of trauma variables and LOS.

VariableMean ± SDa Spearman ρ P Valueb
Glasgow Coma Scale13.9 ± 3.0−0.38<0.0001 b
Injury severity score20.5 ± 12.40.44<0.0001b
N (%)c LOS, median ± IQR
Mechanism of injury  0.69
 Fall95 (48.5)7.0 ± 6.6 
 Motor vehicle collision91 (46.4)6.6 ± 6.8 
 Ped struck4 (2.0)14.3 ± 28.1 
 Other6 (3.1)6.2 ± 4.1 
Fracture level  <0.0001b
 T1-T989 (45.4)8.9 ± 13.1 
 T10-L290 (45.9)6.0.± 3.1 
 L3-L517 (8.7)6.0 ± 4.4 
Fracture morphology  0.005b
 Burst/compression94 (48.5)6.4 ± 4.0 
 Extension-distraction16 (8.2)6.4 ± 7.1 
 Flexion-distraction29 (14.9)6.0 ± 7.6 
 Fracture-dislocation36 (18.6)11.1 ± 12.8 
 Combination >119 (9.8)7.3 ± 8.1 
American Society of Anesthesiologists classification  <0.0001b
 116 (9.1)5.3 ± 5.8 
 273 (41.5)5.8 ± 3.6 
 373 (41.5)8.3 ± 6.4 
 414 (8.0)25.3 ± 29.4 
Loss of consciousness  0.0009b
 No142 (72.4)6.1 ± 4.5 
 Yes54 (27.6)8.9 ± 16.7 
Neurological status  <0.0001b
 Intact92 (48.2)5.7 ± 4.61 
 Incomplete injury59 (30.9)6.6 ± 3.8 
 Complete injury40 (20.9)12.1 ± 20.6 
Pulmonary injury  <0.0001b
 No129 (65.8)5.9 ± 4.0 
 Yes67 (34.2)9.3 ± 12.6 
Assisted ventilation  <0.0001b
 No169 (87.1)6.4 ± 4.2 
 Mec. ventilation <96 h13 (6.7)9.9 ± 15.3 
 Mec. ventilation >96 h12 (6.2)21.8 ± 10.6 
Polytrauma  <0.0001b
 No59 (30.1)5.1 ± 3.1 
 Yes137 (69.9)7.6 ± 8.6 

  • ↵a Continuous variables reported as mean ± SD and Spearman ρ correlation with LOS.

  • ↵b Indicates statistically significant values with P < 0.05.

  • ↵c Categorical variables reported as N (%) and median LOS ± IQR.

  • IQR, interquartile range; LOS, length of stay.