Table 2.

The P values of LSD and Games-Howell test for MAP, HR, and Ramsay at the time points of T2-T4.

Items group	MAP			HR			Ramsay
	Group Dex	Group Oxy	Group Dex + Oxy	Group Dex	Group Oxy	Group Dex + Oxy	Group Dex	Group Oxy	Group Dex + Oxy
T2
Group Con	< 0.001*	< 0.001*	< 0.001*	< 0.001*	< 0.001*	< 0.001*	< 0.001*	0.139	< 0.001*
Group Dex	–	< 0.001*	0.001*	–	< 0.001*	0.23	–	0.003*	0.788
Group Oxy	< 0.001*	–	< 0.001*	< 0.001*	–	< 0.001*	0.003*	–	< 0.001*
Group Dex + Oxy	0.001*	P < 0.001*	–	0.23	< 0.001*	–	0.788	< 0.001*	–
T3
Group Con	< 0.001*	0.103	< 0.001*	< 0.001*	0.013*	< 0.001*	< 0.001*	0.248	< 0.001*
Group Dex	–	0.042*	0.012*	–	< 0.001*	0.083	–	< 0.001*	1.000
Group Oxy	0.042*	–	< 0.001*	< 0.001*	–	< 0.001*	< 0.001*	–	< 0.001*
Group Dex + Oxy	0.012*	< 0.001*	–	0.083	< 0.001*	–	1.000	< 0.001*	–
T4
Group Con	< 0.001*	0.033*	< 0.001*	< 0.001*	0.001*	< 0.001*	0.015*	0.730	< 0.001*
Group Dex	–	0.036*	0.190	–	0.266	0.075	–	0.005*	0.160
Group Oxy	0.036*	–	0.001*	0.266	–	0.004*	0.005*	–	< 0.001*
Group Dex + Oxy	0.190	< 0.001*	–	0.075	0.004*	–	0.160	< 0.001*	–

MAP mean arterial pressure, HR heart rate, T2 working cannula establishment, T3 nucleus pulposus removal, T4 immediately postoperation.

*Difference was statistically significant; “–” The same group;