Table 1.
Demographics
| Group A (n = 9132) | Group B (n = 9002) | All (n = 18,134) | |
|---|---|---|---|
| Age median, [IQR] |
66 [52–76] | 67 [53–76] | 66 [52–76] |
| Male sex (%) | 56% | 56% | 56% |
| APACHE II score median, [IQR] |
16 [12–21] | 16 [12–21] | 16 [12–21] |
| ICU length of stay days median [IQR] | 3 [2–7] | 3 [2–6] | 3 [2–7] |
| Hospital length of stay days median [IQR] |
14 [7–27] | 14 [7–28] | 14 [7–28] |
| Reason for ICU admission n (%) | |||
| Respiratory tract infection | 966 (11) | 972 (11) | 1938 (11) |
| Major vascular procedure | 453 (5) | 428 (5) | 881 (5) |
| Large bowel tumour | 383 (4) | 454 (5) | 837 (5) |
| Acute renal failure | 439 (5) | 420 (5) | 859 (5) |
| Chronic obstructive pulmonary disease | 283 (3) | 292 (3) | 575 (3) |
| Bowel perforation | 278 (3) | 226 (3) | 504 (3) |
| Septicaemia/septic shock | 304 (3) | 300 (3) | 604 (3) |
| Oesophageal neoplasm | 130 (1) | 136 (2) | 266 (1) |
| Status epilepticus | 198 (2) | 174 (2) | 372 (2) |
| Self-poisoning | 290 (3) | 291 (3) | 581 (3) |
| Not recorded | 301 (3) | 309 (3) | 610 (3) |
| Other | 5107 (56) | 5000 (56) | 10,107 (56) |
n (%), median [interquartile range]