Table 5.

Comparison of MAP, HR, and SpO₂ in the three groups

Item	Time point	Group R2	Group R4	Group R6	P
MAP, mm Hg	T0	89.7 ± 8.7	85.8 ± 9.5	87.2 ± 9.1	0.162
	T1	76.4 ± 7.7&&	73.1 ± 7.6&&*	71.8 ± 6.9&&**	0.018
	T2	79.4 ± 9.5&&	76.5 ± 10.8&&	73.2 ± 6.5&&**	0.010
	T3	84.6 ± 13.4	80.6 ± 13.2	76.9 ± 7.2&&**	0.014
	T4	82.6 ± 8.8&&	83.1 ± 9.5	80.7 ± 6.4&&	0.392
HR, beats/min	T0	80.0 ± 11.3	77.3 ± 10.0	78.7 ± 10.4	0.511
	T1	71.1 ± 7.9&&	69.3 ± 7.1&&	72.6 ± 14.2	0.345
	T2	72.8 ± 10.9&	71.8 ± 12.0&	75.4 ± 14.0	0.400
	T3	75.3 ± 10.0	75.8 ± 14.5	78.2 ± 11.3	0.526
	T4	76.7 ± 7.9	78.2 ± 10.8	76.1 ± 9.5	0.601
SpO2, %	T0	97.8 ± 1.1	97.9 ± 1.1	98.1 ± 1.1	0.476
	T1	96.6 ± 2.8&	95.5 ± 3.9&&	93.8 ± 4.8&&**	0.006
	T2	96.2 ± 2.4&&	95.7 ± 2.9&&	95.0 ± 3.8&&	0.200
	T3	96.9 ± 2.4	96.5 ± 2.3&&	96.4 ± 2.2&&	0.658
	T4	97.8 ± 1.2	98.0 ± 0.9	98.1 ± 0.8	0.482

Compared with group T₀, ^&P <0.05, ^&&P <0.01; compared with group R2, ^*P <0.05, ^**P <0.01

Abbreviations: HR heart rate, MAP mean arterial pressure, SpO₂ pulse oxygen saturation