Table 2.

BIS values at each time point in Group 1 < yr. ≤ 5 and Group 5 < yr. ≤ 12 $\left(\overline{\mathrm{x}}\pm \mathrm{s}\right)$

time/s	BIS
	Group 1 < yr. ≤ 5	Group 5 < yr. ≤ 12
0	91 ± 7	94 ± 5
30	75 ± 20*	82 ± 21*
40	57 ± 21*cd	58 ± 25*e
50	52 ± 18*ac	37 ± 16*af
60	49 ± 17*ac	35 ± 14*af
90	55 ± 13*acd	37 ± 11*af
120	63 ± 8*ad	46 ± 14*a
180	66 ± 5*ad	57 ± 8*ae
240	67 ± 5*ad	62 ± 5*ae

^a P < 0.05, values of BIS were compared between the group 1 < yr. ≤ 5 and the group 1 < yr. ≤ 2 at the same time point

*P < 0.01, BIS values with superscript * compared with BIS values at 0 s time point

^c P < 0.05, BIS values with superscript c compared with BIS values at the other time point of group 1 < yr. ≤ 5

^d P < 0.05, BIS values with superscript d compared with BIS values at the other time point of group 1 < yr. ≤ 5

^e P < 0.05, BIS values with superscript e compared with BIS values at the other time point of group 5 < yr. ≤ 12

^f P < 0.05, BIS values with superscript d compared with BIS values at the other time point of group 5 < yr. ≤ 12