Table 1. Study population.

Characteristics	Value
Sex
Male	58,411 (45%)
Female	71,787 (55%)
Age (years), mean ± SD [range]	69±12 [18–89]
BMI (kg/m2), mean ± SD [range]	27±30 [15–70]
American Society of Anesthesiologists (ASA)	2.4±0.6 [1–5]
Surgery type
Elective	125,293 (96%)
Non-elective	4,968 (4%)