Table 2.
Summary of included admissions
| Characteristic | Overall | 2007 | 2008 | 2009 |
|---|---|---|---|---|
| Number of admissions | 23,269 | 7,396 | 7,994 | 7,879 |
| Age | ||||
| Mean (SD) | 57.5 (18.0) | 57.6 (18.1) | 57.4 (18.2) | 57.5 (17.8) |
| Median (IQR) | 61 (45, 72) | 61 (45, 72) | 61 (45, 72) | 61 (45, 71) |
| Sex, n (%) | ||||
| Female | 10,211 (43.9) | 3,218 (43.5) | 3,543 (44.3) | 3,450 (43.8) |
| Male | 13,058 (56.1) | 4,178 (56.5) | 4,451 (55.7) | 4,429 (56.2) |
| Surgical status, n (%) | ||||
| Elective/scheduled | 2,438 (10.5) | 695 (9.4) | 846 (10.6) | 897 (11.4) |
| Emergency/urgent | 5,196 (22.4) | 1,580 (21.4) | 1,851 (23.2) | 1,765 (22.5) |
| Non-surgical | 15,608 (67.2) | 5,121 (69.2) | 5,296 (66.3) | 5,191 (66.1) |
| ICNARC Physiology Score | ||||
| Mean (SD) | 19.6 (9.5) | 20.0 (9.5) | 19.4 (9.5) | 19.2 (9.4) |
| Median (IQR) | 18 (12, 25) | 18 (13, 26) | 18 (12, 25) | 18 (12, 25) |
| ICNARC model (2009 recalibration) predicted risk of acute hospital mortality (%) | ||||
| Mean (SD) | 30.1 (26.3) | 31.2 (26.6) | 29.7 (26.3) | 29.6 (26.0) |
| Median (IQR) | 22.3 (7.3, 47.9) | 24.0 (7.8, 49.6) | 21.8 (7.1, 47.0) | 21.4 (7.2, 47.3) |
| APACHE II Score | ||||
| Mean (SD) | 19.1 (8.1) | 19.2 (8.0) | 19.1 (8.2) | 18.9 (8.2) |
| Median (IQR) | 18 (13, 24) | 19 (13, 24) | 18 (13, 24) | 18 (13, 24) |
| APACHE II predicted risk of acute hospital mortality (%) | ||||
| Mean (SD) | 33.0 (25.3) | 33.3 (25.0) | 32.9 (25.3) | 32.8 (25.5) |
| Median (IQR) | 27.4 (11.3, 49.7) | 28.5 (12.0, 49.7) | 27.0 (11.3, 49.7) | 26.6 (10.9, 50.1) |
| Acute hospital mortality | ||||
| Deaths (%) | 6,907 (29.7) | 2,296 (31.0) | 2,342 (29.3) | 2,269 (28.8) |
| [95% CI] | [29.1, 30.3] | [30.0, 32.1] | [28.3, 30.3] | [27.8, 29.8] |
Summary of included admissions for the full three-year SICSAG database extract and for each year from 2007 to 2009.
APACHE, Acute Physiology And Chronic Health Evaluation; CI, confidence interval; ICNARC, Intensive Care National Audit & Research Centre; IQR, interquartile range; SD, standard deviation; SICSAG, Scottish Intensive Care Society Audit Group.