Table 3 The postoperative pain scores of the two groups were compared

Postoperation2h

2.28 ± 0.64

3.14 ± 0.67

 < 0.001

Postoperation6h

4.24 ± 0.72

4.84 ± 0.69

 < 0.001

Postoperation12h

4.18 ± 0.63

4.70 ± 0.49

 < 0.001

Postoperation24h

3.22 ± 0.58

3.60 ± 0.65

 < 0.001

Postoperation48h

2.34 ± 0.56

3.02 ± 0.62

 < 0.001

PCIA effective pressure(time)

2.98 ± 0.55

3.42 ± 0.62

 < 0.001

PCIA total pressure(time)

3.70 ± 1.11

4.74 ± 0.78

 < 0.001

Rescue analgesia [case (%)]

6(13)

8(17)

0.56