Table 3.

Patients’ clinical evaluation in patients classified based on the presence of COMT A_C_C_G haplotype, determining low enzyme activity

	Haplotype L (A_C_C_G)		Present vs. absent
	Absent (n = 138)	Present (n = 38)	p value
Preoperative ODI	25.79 ± 9.49	27.68 ± 8.82	0.27
Postoperative ODI	17.36 ± 10.69	15.42 ± 10.20	0.28
ODI change	−8.42 ± 11.6	−12.26 ± 10.44	0.079
Preoperative VAS BACK	6.68 ± 2.73	6.89 ± 2.42	0.81
Postoperative VAS BACK	4.65 ± 2.8	3.65 ± 2.97	0.052
VAS BACK change	−2.08 ± 2.78	−3.23 ± 3.12	0.017
Preoperative VAS LEG	7.01 ± 2.65	7.06 ± 2.23	0.77
Postoperative VAS LEG	3.97 ± 3.17	4.07 ± 3.2	0.92
VAS LEG change	−3.04 ± 3.56	−3.03 ± 3.73	0.98

Significance for bold numbers in all the text (including tables) is p < 0.05