Table 5.

β-Amyloid protein (Aβ) levels of the POCD and non-POCD groups

Time	Aβ level (pg/ml)		P
	Non-POCD (n=25)	POCD (n=21)
t 0	78.11±11.25	78.90±11.07	0.990
t 1	78.24±9.31	83.98±9.83	0.076
t 2	79.11±11.60	85.28±9.73**	0.060
t 3	80.72±11.55	90.88±9.66*, **	0.003
t 4	89.65±10.73**,	101.70±9.25* **	<0.001
t 5	91.23±11.33**	114.57±10.27*, **	<0.001
24 h	78.23±11.16	100.27±6.79*, **	<0.001

Data are presented as mean±SD

^* P<0.05, vs. non-POCD group

^** P<0.05, vs. baseline in either group