Table 4 Mean pain score differences among the groups in the 1st, 3rd, and 7th postoperative days

Mean difference (95% CI)

(Group1 vs. Group 2)

1.25 (0.34–2.16)

0.95 (0.01–1.89)

0.9 (− 0.411 to 2.21)

p value

0.002

0.028

0.043

Mean difference (95% CI)

(Group1 vs. Group 3)

1.15 (0.24–2.06)

0.90 (− 0.036 to 1.83)

0.7 (− 0.61 to 2.01)

p value

0.005

0.049

0.16

Mean difference (95% CI)

(Group1 vs. Group 4)

2.00 (1.09–2.91)

1.55 (0.61–2.48)

1.3 (− 0.01 to 2.61)

pvalue

< 0.0001

< 0.0001

0.04

Mean difference (95% CI)

(Group2 vs. Group 3)

− 1.00 (− 1.02 to 0.81)

− 0.05 (− 0.98 to 0.86)

− 0.2 (− 1.51 to 1.11)

p value

1.0

0.95

0.50

Mean difference (95% CI)

(Group2 vs. Group 4)

0.75 (− 0.16 to 1.66)

0.60 (− 0.33 to 1.53)

0.4 (− 0.912 to 1.711)

p value

0.017*

0.051

0.48

Mean difference (95% CI)

(Group3 vs. Group 4)

− 0.85 (− 1.76 to 0.06)

0.65 (− 0.28 to 1.59)

0.6 (− 0.711 to 1.911)

p value

0.016

0.025

0.166