Table 5. Quintile regression of the relationship between length of stay (hours) and characteristics of trauma patients .
| Variables | Crude β (95% CI) | Adjusted β (95% CI) |
| Age (y) | ||
| < 18 | Ref. | Ref. |
| 18‒64 | 15 (8.2, 21.7) | 12 (5.0, 18.9) |
| ≥ 65 | 47 (36.6, 57.4) | 30 (18.7, 41.3) |
| Injury severity score | ||
| 1‒8 | Ref. | Ref. |
| 9‒15 | 81 (72.8, 89.2) | 65 (56.7, 73.3) |
| ≥ 16 | 229 (194.8, 263.2) | 199 (165.9, 232.1) |
| Glasgow coma scale | ||
| 13‒15 | Ref. | Ref. |
| 9‒12 | 220 (193.5, 246.5) | 168 (140.5, 195.5) |
| 3‒8 | 249 (215.8, 282.2) | 186 (151.7, 220.3) |
| Cause of injury | ||
| Road traffic crashes | Ref. | Ref. |
| Blunt | -26 (-34.3, -17.7) | -21 (-30.9, -11.1) |
| Fall | -5 (-10.8, 0.8) | -9 (-16.2, -1.8) |
| Stab/cut | -27 (-34.7, -19.3) | -23 (-32.2, -13.8) |
| Others | -9 (-22.4, 4.4) | -5 (-25.3, 15.3) |
| Body region | ||
| Extremities | Ref. | Ref. |
| Head/neck/face | 7 (-1.1, 15.1) | 2 (-8.2, 12.2) |
| Thorax | 18 (0.2, 35.8) | 11 (-11.3, 33.3) |
| Abdomen | 14 (-9.1, 37.1) | 19 (-9.7, 47.7) |
| Spine | 47 (30.1, 63.9) | 48 (27.1, 68.9) |
| Multiple trauma | 15 (10.1, 19.9) | 12 (5.8, 18.2) |
| Unknown | 4 (-16.1, 24.1) | 4 (-27.1, 35.1) |
Note. CI: Confidence interval.