Table 2 VAS* for post-operative (mean, standard deviation) and PCA* consumption for post-operative 72 h (mean, standard deviation)

6 h

1.71(0.41)

7.28(2.50)

P < 0.00*

12 h

2.81(0.72)

6.29(1.85)

P < 0.00*

24 h

4.53(1.15)

5.61(1.52)

0.03*

48 h

3.45(1.08)

3.82(0.92)

0.32

72 h

3.52(0.55)

3.62(0.71)

0.28

PCA* consumption (ml)

75.72(9.78)

87.90(17.39)

P < 0.00*

MME*

18.60(3.72)

21.11(4.88)

P < 0.00*

Additional analgesic injection (number of injection)

1.25(0.32)

1.88(0.65)

P < 0.00*