Number of subjects recruited and results analysed
| Characteristic | |
| Patients | |
| No | 154 |
| Age (mean; SD) | 68.0 (15.2) |
| Gender (% male) | 53.2 |
| Setting | |
| ICU (n; %) | 44 (28.6) |
| Non-ICU (n; %) | 110 (71.4) |
| Tests | |
| No | 496 |
| Initial versus repeat | |
| Initial (n; %) | 96 (19.4) |
| Subsequent (n; %) | 400 (80.6) |
| Setting | |
| ICU (n; %) | 220 (44.4) |
| Non-ICU (n; %) | 276 (55.6) |
ICU, intensive care unit.