Table 1. Patient characteristics.

Parameters	Group 1 (N=12)	Group 2 (N=455)	P value
Age (years)	66 [50–76]	69 [26–89]	0.566
ASA score	2.5 [2–3]	2 [1–4]	0.391
Female/male	4/8	187/268	0.769
BMI (kg/m2)	26.3 [21.3–34.7]	24.8 [13.8–40.9]	0.094

Values are presented as median (range) or number. ASA, American Society of Anesthesiologists; BMI, body mass index.