Table 3.

Comparison of MMSE scores

Group	6 hours after anesthesia	12 hours after anesthesia	24 hours after anesthesia
General anesthesia group (n=44)	21.56 ± 2.43	26.31 ± 1.87	28.35 ± 1.25
Joint group (n=53)	24.28 ± 2.39	27.68 ± 1.53	28.73 ± 1.03
t	5.529	3.969	1.642
P	< 0.001	< 0.001	0.104