Table 2.

Preoperative Baseline CSF Aβ Levels between S, SD, and SI Anesthesia Groups

	S (N = 35)	SD (N = 33)	SI (N = 38)	F Values	P Values
Aβ40, ng/ml	11.59 ± 2.73	12.35 ± 2.90	10.90 ± 2.6	2.37	0.10
Aβ42, ng/ml	0.43 ± 0.95	0.39 ± 0.09	0.39 ± 0.11	1.68	0.19

The preoperative baseline Aβ40 and Aβ42 levels are not significantly different among surgery under S (N = 35), SD (N = 33), and SI (N = 38) anesthesia groups.

Aβ = β-amyloid protein; CSF = cerebrospinal fluid; S = spinal; SD = spinal plus desflurane; SI = spinal plus isoflurane.