Table 3. Measures of association (unadjusted hazard ratios) of different characteristics with length of hospital stay.
| Variable | HR (95%CI) | Z | p |
|---|---|---|---|
| Body Region | |||
| Head and Neck | Ref | ||
| Lower limb | 0.68 (0.51–0.91) | -2.62 | 0.009 |
| Trunk | 0.62 (0.44–0.87) | -2.79 | 0.005 |
| Upper Limb | 0.99 (0.68–1.16) | -0.01 | 0.991 |
| Crushing | |||
| No | Ref | ||
| Yes | 0.57 (0.36–0.89) | -2.48 | 0.013 |
| Amputation | |||
| No | Ref | ||
| Yes | 0.65 (0.43–0.99) | -2.01 | 0.045 |
| Surgery Type | |||
| Orthopaedics | Ref | ||
| Neurosurgery | 0.90 (0.64–1.26) | -0.61 | 0.542 |
| Plastic surgery | 0.57 (0.38–0.85) | -2.76 | 0.006 |
| Wound care | 1.42 (0.87–2.34) | 1.39 | 0.163 |
| Other | 0.84 (0.56–1.25) | -0.87 | 0.382 |
HR: hazard ratio; 95%CI: 95% confidence interval; Z: Z-score; p: p-value; Ref: reference category. Significant p-values (lower than 0.5) are presented in bold.