Table 3. Pain conditions of different groups of patients by VAS scores and PCIA pressing times.

Variables	Time points	Parecoxib	Dexmedetomidine	Combined	Control
VAS	4 h	3.7±1.7c,d	3.9±1.3c,d	2.4±1.0a,b,d	5.8±2.3a,b,c
	12 h	2.9±0.9c,d	3.0±1.2c,d	1.8±0.4a,b,d	4.6±1.7a,b,c
	24 h	1.9±0.2c,d	2.1±0.6c,d	1.4±0.1a,b,d	2.8±0.8a,b,c
	48 h	1.1±0.1d	1.0±0.1d	1.1±0.1 d	1.2±0.1a,b,c
PCIA	48 h	5.0±1.3c,d	5.1±1.9c,d	3.4±1.4a,b,d	7.8±2.3a,b,c

^aP<0.05, compared with the Parecoxib group;

^bP<0.05, compared with DEX group;

^cP<0.05, compared with Combined group;

^dP<0.05, compared with Control group.

VAS Visual Analogue Score, PICA patient-controlled intravenous analgesia pump.