Cox multivariable proportional hazards regression model for variables associated with time to discharge
| Variable | HR*(95% CI) |
|---|---|
| Log (baseline risk of death) | 0.64 (0.63–0.64) |
| Log (baseline risk of death) (2) | 0.97 (0.97–0.97) |
| Hospital-acquired C. difficile | 0.32 (0.25–0.41) |
| Log (baseline risk of death) × hospital-acquired C. difficile | 0.96 (0.93–0.97) |
| Hospital-acquired C. difficile × log (time) | 1.24 (1.16–1.33) |
| Log (baseline risk of death) × log (time) | 1.12 (1.11–1.12) |
| Log (baseline risk of death) (2) × log (time) | 1.01 (1.00–1.01) |
| Year of admission | 1.02 (1.02–1.02) |
| No. of inpatient admissions in the previous year | 1.06 (1.05–1.06) |
| No. of inpatient days in the previous year | 0.99 (0.99–0.99) |
Note: CI = confidence interval, HR = hazard ratio.
↵* A hazard ratio of less than one corresponds to an increased length of stay, whereas a hazard ratio of greater than one corresponds to a decreased length of stay.