Table 3. Comparison of clinical outcomes between H-HEMS and GEMS groups.
| Outcomes | H-HEMS | GEMS | P value |
|---|---|---|---|
| ICU stay, day | 7.0 (3.0–15.0) | 4.0 (1.0–8.0) | 0.002 |
| Total number of admission days | 27.0 (12.0–50.0) | 21.0 (10.0–36.0) | 0.251 |
| Actual survival rate | 54 (90.0) | 200 (88.9) | - |
| Predicted survival rate | 50.2 (83.7) | 196.4 (87.1) | - |
| Z statistics | 1.56 | 0.84 | - |
| P value* | 0.119 | 0.400 | - |
| W statistics | 6.32 | 1.58 | - |
Values are presented as median (IQR) or number (%).
H-HEMS = hospital-based helicopter emergency medical services, GEMS = ground ambulance emergency medical services, ICU = intensive care unit, IQR = interquartile range.
*Significance level for Z statistical values.