Table 2.
Outcomes before and after propensity score matching
| Before propensity score matching | After propensity score matching | |||||
| ICU | HDU | ICU | HDU | Difference | ||
| Outcomes | (n=7,528) | (n=7,331) | (n = 4,982) | (n = 4,982) | (95% CI) | P value |
| 30-day in-hospital mortality | 1,867 (24.8) | 2,344 (32.0) | 1,196 (24.0) | 1,555 (31.2) | -7.2 (-10.0 to -4.4) | < .001 |
| ICU/HDU mortality | 1,165 (15.5) | 1,575 (21.5) | 741 (14.9) | 1,061 (21.3) | -6.4 (-9.3 to -3.6) | < .001 |
| Length of hospital stay, days | 31 (40) | 26 (33) | 30 (34) | 27 (34) | 3.2 (1.4 to 5.1) | .001 |
| ICU/HDU-free days, days | 17 (11) | 15 (12) | 18 (11) | 15 (11) | 2.3 (1.6 to 3.1) | < .001 |
| MV-free days, days | 15 (12) | 14 (12) | 15 (12) | 14 (12) | 1.4 (0.7 to 2.1) | < .001 |
| Total hospitalization cost, USD | 19,240 (17,563) | 13,842 (13,541) | 17,830 (16,028) | 14,653 (14,319) | 3,176 (2,191 to 4,162) | < .001 |
| ARDS after admission | 106 (1.4) | 59 (0.8) | 54 (1.1) | 48 (1.0) | 0.1 (-0.3 to 0.5) | .58 |
| CRBSI after admission | 16 (0.2) | 11 (0.2) | 12 (0.2) | 10 (0.2) | 0.0 (-0.2 to 0.2) | .70 |
Continuous variables are presented as means and standard deviations, and categorical variables are described using numbers and percentages.
ICU, intensive care unit; HDU, high-dependency care unit; CI, confidence interval; MV, mechanical ventilation; USD, United States dollars; ARDS, acute respiratory distress syndrome; CRBSI, catheter related blood stream infection