Table 2.

Demographic data. BMI: body Mass Index; CCI: Charlson Comorbidity Index; ASA: American Society of Anesthesiologists. *Mean ± standard deviation.

	2019	2020	P	Rate of patients with available data, %
Age*	69.26 (12.13)	69.1 (12.17)	0.55	100
BMI*	25.18 (4.32)	25.21 (4.22)	0.11	83
CCI*	5.28 (2.22)	5.38 (2.08)	0.04	91
Sex			0.98	78
-Female n,(%)	1497 (43.5)	1301 (43.6)
-Male n, (%)	1942 (56.5)	1686 (56.4)
ASA			0.74	93
-1/2 n, (%)	2247 (55.3)	1986 (54.9)
-3/4 n, (%)	1820 (44.7)	1633 (45.1)