. 2007 Jul 13;11(4):R78. doi: 10.1186/cc5970

Table 1.

Demographic and clinical characteristics

Characteristic	Included patients (n = 451)
Age (years)^a	71.0 (63 to 71)
Sex (male/female; %)	61.2/38.8
APACHE II score^a	19.0 (15 to 23)
ICU length of stay (days)^a	8.0 (5 to 16)
Hospital length of stay (days)^a	23.0 (14 to 40)
Ventilation days+	6.0 (3 to 13)
Type of admission (%)
Nonsurgical^b	53.2
Elective surgery^c	8.7
Acute surgery^d	38.1

^aMedian (interquartile range). ^bAll admissions other than surgical. ^cIntensive care unit (ICU) admission was planned within a 24-hour period before surgery. ^dUnplanned surgery. APACHE-II, Acute Physiology and Chronic Health Evaluation.