Table 2. Analyses for primary outcome (readmission to hospital) and secondary outcome (all-cause mortality).
|
Primary Outcome
Readmission to Hospital |
Category | Frequencies | Cox PH Regression | ||
| Unadjusted Sample | |||||
| Non-MV | Total (n = 17,562) | Readmitted (n = 1,994; 11.4%) | Hazard Ratio (95% CI) | Hazard Ratio ‡ (95% CI) | |
| 16,431 (93.6%) | 1,632 (9.9%) | REF | REF | ||
| MV | 1,131 (6.4%) | 362 (32.1%) | 3.60*** (3.22 to 4.04) | 4.13*** (3.63 to 4.72) | |
| Propensity Score–Matched Sample | |||||
| Non-MV | Total (n = 2,262) | Readmitted (n = 485; 21.4%) | Hazard Ratio (95% CI) | Hazard Ratio ‡ (95% CI) | |
| 1,131 (50.0%) | 123 (10.9%) | REF | REF | ||
| MV | 1,131 (50.0%) | 362 (32.1%) | 3.34*** (2.72 to 4.10) | 3.67*** (2.99 to 4.53) | |
|
Secondary Outcome
All-cause Mortality |
Unadjusted Sample | ||||
| Non-MV | Total (n = 17,562) | Mortality (n = 735; 4.2%) | Hazard Ratio (95% CI) | Hazard Ratio ‡ (95% CI) | |
| 16,431 (93.6%) | 562 (3.4%) | REF | REF | ||
| MV | 1,131 (6.4%) | 173 (15.3%) | 4.76*** (4.01 to 5.64) | 5.64*** (4.62 to 6.88) | |
| Propensity Score–Matched Sample | |||||
| Non-MV | Total (n = 2,262) | Mortality (n = 232; 10.3%) | Hazard Ratio (95% CI) | Hazard Ratio ‡ (95% CI) | |
| 1,131 (50.0%) | 59 (5.2%) | REF | REF | ||
| MV | 1,131 (50.0%) | 173 (15.3%) | 3.12*** (2.32 to 4.20) | 3.79*** (2.82 to 5.10) | |
*p < .05
**p < .01
***p < .001
‡ Covariate adjusted for length of stay
MV = Mechanical Ventilation