Table IV.

Changes in bispectral index values of four groups of patients at different time points before anesthesia induction and before and after skin incision.

Group	n	T0	T1	T2	T3	T4	T5	T6
Group D	20	93.23±6.90	81.21±6.01a	67.30±6.26a	61.54±6.54a	54.07±6.72a	48.92±6.88a	46.39±6.99a
Group S	20	91.56±6.21	80.56±6.21b	66.59±6.77b	60.32±6.79b	52.55±6.98b	46.90±6.21b	47.99±7.45b
Group C1	20	93.52±6.77	85.08±5.22	72.50±5.29	66.37±5.61	58.59±5.87	53.32±6.03	57.06±6.33
Group C2	20	93.84±6.82	87.34±5.31	73.15±5.12	67.37±5.50	57.45±5.99	55.09±5.25	58.18±5.27
F-value		0.46	3.927	3.247	4.957	3.683	4.325	4.568
P-value		0.709	0.0129	0.0322	0.0065	0.0232	0.0166	0.0147

^aP<0.05 Group D vs. Group C1

^bP<0.05 Group S vs. Group C2.