Table 2.
Unadjusted primary and secondary outcomes of patients by category of critical care registered nurses in each intensive care unit.
| <50% CCRN |
50–75% CCRN |
>75% CCRN |
p value | |
|---|---|---|---|---|
| N = 2360 | N = 7695 | N = 6563 | ||
| Primary outcome | ||||
| In-hospital mortality | 252 (10.7%) | 859 (11.2%) | 534 (8.1%) | <0.001 |
| Secondary outcomes | ||||
| In-ICU mortality | 180 (7.6%) | 594 (7.7%) | 351 (5.3%) | <0.001 |
| Delirium in ICU | 258 (12.8%) | 618 (10.0%) | 150 (4.1%) | <0.001 |
| Pressure injury developed in ICU | 57 (2.7%) | 135 (2.1%) | 46 (1.2%) | <0.001 |
| Duration of ICU stay (days) | 2.2 (1.1–4.8) | 2.1 (1.1–4.2) | 1.8 (0.9–3.2) | <0.001 |
| Ratio of observed to predicted length of ICU stayb | 1.18 (0.66–2.16) | 1.11 (0.65–1.93) | 1.01 (0.64–1.63) | <0.001 |
| Duration of stay in hospital (days) | 7.8 (3.8–14.8) | 8.3 (4.3–15.8) | 8.0 (4.3–14.6) | <0.001 |
| After-hours discharge from ICUa | 552 (25.3%) | 1576 (22.2%) | 831 (13.4%) | <0.001 |
CCRN, Critical Care Registered Nurse; ICU, Intensive Care Unit.
a
ICU survivors only.
b
Predicted length of ICU stay is derived from the ANZICS prediction model to estimate expected ICU length of stay. A ratio >1 represents an ICU stay that is longer than predicted.