Table V.

Variables and valuations.

Variable	Valuations
Age	<70:1, ≥70:2
Educational level	≤9:1, >9:2
Anesthesia duration	≥3 h:1, <3 h:2
Intraoperative blood loss	≥350 ml:1, <350 ml:2
IL-6	Highly expressed (≥91.28 pg/ml):1,
	Lowly expressed (<91.28 pg/ml):2
S-100β	Highly expressed (≥3.46 µg/l):1,
	Lowly expressed (<3.46 µg/l):2