Table 2

General linear regression model testing the association between the presence of comorbidity and length of hospital stay

CharacteristicsAdjusted mean length of stay*Parameter estimate (and SD)*p value†
Presence of comorbidity
 No15.2
 Yes28.90.64 (0.08)<0.001
Age, yr
 14–5411.5
 55–6412.90.12 (0.09)0.2
 65–7421.10.61 (0.11)<0.001
 75–8433.71.08 (0.11)<0.001
 85–10038.71.22 (0.14)<0.001
Injury Severity Score
 1–85.8
 9–1510.40.58 (0.06)<0.001
 16–2423.51.40 (0.10)<0.001
 25–4040.61.94 (0.12)<0.001
 41–5070.52.50 (0.26)<0.001
Revised Trauma Score
 7.8419.7
 <7.8424.50.18 (0.10)0.08
Glasgow Coma Scale score
 1519.7
 <1523.50.21 (0.12)0.09

  • ↵* Adjusted means of length of hospitalization and parameter estimates are generated by the general linear regression model including comorbidity, age and Injury Severity Score.

  • ↵† Compared with baseline category.

  • SD = standard deviation.