Table 1. Characteristics of the Cohort.

Characteristic	Value (N = 101 196)
Deaths, No. (%)	10 505 (10.4)
Length of stay, mean (SD) [IQR], d
First ICU	3.5 (4.4) [1-3]
Hospital	11.6 (17.1) [4-13]
Age, mean (SD) [IQR], y	61.3 (17.1) [51-74]
Male, No. (%)	51 899 (51.3)
Age categories, No. (%)
<40 y	12 197 (12.1)
40-59 y	30 567 (30.2)
60-79 y	42 828 (42.3)
>79 y	15 604 (15.4)
Type of ICU at first admission, No. (%)
Combined medical and surgical	32 218 (31.8)
Medical	19 110 (18.9)
Surgical	21 910 (21.6)
Neurologic	14 242 (14.1)
Coronary care	13 716 (13.6)

Abbreviations: ICU, intensive care unit; IQR, interquartile range.