Table 1. Characteristics of adult patients admitted to Australian and New Zealand ICUs 2011–2015.
| Variable | Totala | |
|---|---|---|
| Total | N | 662,525 (100.0%) |
| Length of Stay | Mean (days) | 3.21 |
| Geometric mean (days) | 1.86 | |
| Median (IQR) days | 1.79 (0.92–3.52) | |
| Age | Mean (SD) years | 62.0 (17.5) |
| Median (IQR) years | 65.0 (51.0–75.3) | |
| Sex | Male, % (N) | 57.8% (382,852) |
| Admission | Elective, % (N) | 43.2% (285,172) |
| Surgical, % (N) | 53.5% (354,583) | |
| Ventilated | % (N) | 37.8% (250,411) |
| Top 5 diagnoses | Coronary artery bypass grafts | 46,510 (7.0%) |
| Orthopaedic surgery | 28,544 (4.3%) | |
| GI neoplasm | 27,983 (4.2%) | |
| Valvular heart surgery | 26,703 (4.0%) | |
| Drug overdose | 23,043 (3.5%) | |
| Year of admission, N (%) | 2011 | 118,686 (17.9%) |
| 2012 | 127,563 (19.3%) | |
| 2013 | 123,034 (19.9%) | |
| 2014 | 143,271 (21.6%) | |
| 2015 | 140,971 (21.3%) | |
| Hospital Type | Rural/Regional [N = 40] n(%) | 88,769 (13.4%) |
| Metropolitan [N = 36] n(%) | 114,998 (17.4%) | |
| Tertiary/Teaching [N = 38] n(%) | 288,242 (43.5%) | |
| Private [N = 54] n(%) | 170,516 (25.7%) | |
| ICU Admission source | Operating Theatre / Recovery | 343,617 (51.9%) |
| Accident & Emergency | 168,667 (25.5%) | |
| Ward | 105,631 (16.0%) | |
| Other ICU, same hospital | 1,507 (0.2%) | |
| Other hospital | 37,428 (5.7%) | |
| Other hospital ICU | 5,333 (0.8%) | |
| Hospital Admission source | Home, % (N) | 76.3% (505,526) |
| Other Acute Hospital, %(N) | 17.0% (112,721) | |
| Chronic Care Hospital, %(N) | 0.8% (5,393) | |
| Other Hospital ICU | 0.9% (5,688) | |
| Unknown | 5.0% (33,197) | |
| Severity | Mean ANZRODb | 0.097 |
| Median ANZROD (IQR) | 0.022 (0.007–0.089) | |
| Mean APACHEIII Risk of Death | 0.131 | |
| Median APACHEIII Risk of Death (IQR) | 0.043 (0.013–0.148) | |
| Hospital Mortality, %(N) | 60,859 (9.2%) |
a Percentages refer to proportion of non-missing values
b Australian and New Zealand Risk of Death Score (ANZROD)