Characteristics of critically ill patients with traumatic brain injury, anoxic brain injury, subarachnoid hemorrhage or intracerebral hemorrhage admitted to an intensive care unit in Calgary, Alberta, from Jan. 1, 2002, to June 30, 2012
| Characteristic | Median (IQR) or % (no.) | p value* | ||
|---|---|---|---|---|
| Jan. 1, 2002, to June 30, 2005, n = 924 | July 1, 2005, to Dec. 31, 2008, n = 1019 | Jan. 1, 2009, to June 30, 2012, n = 845 | ||
| Age, yr | 49 (29–66) | 50 (31–64) | 51 (34–65) | 0.2 |
| Female | 34.5 (319) | 34.2 (348) | 37.0 (313) | 0.4 |
| Diagnosis | 0.05 | |||
| Traumatic brain injury | 55.1 (509) | 55.4 (565) | 50.5 (427) | |
| Anoxic brain injury | 16.1 (149) | 17.9 (182) | 21.9 (185) | |
| Subarachnoid hemorrhage | 15.3 (141) | 14.6 (149) | 14.0 (118) | |
| Intracerebral hemorrhage | 13.5 (125) | 12.1 (123) | 13.6 (115) | |
| Glasgow Coma Scale score | 7 (4–10) | 7 (4–10) | 7 (3–11) | 0.9 |
| APACHE II score | ||||
| Full score | 20 (14–26) | 19 (13–26) | 19 (13–26) | 0.3 |
| Modified score† | 10 (6–15) | 9 (6–15) | 9 (5–14) | 0.2 |
Note: APACHE = Acute Physiology and Chronic Health Evaluation, IQR = interquartile range.
↵* Nonparametric testing (Kruskal–Wallis test) was used for continuous variables and χ2 testing was used for discrete variables.
↵† Age and Glasgow Coma Scale score are components of the APACHE II score. The modified score was calculated by subtracting the impact of these variables.