Chronic pain after lower abdominal surgery: do catechol-O-methyl transferase/opioid receptor μ-1 polymorphisms contribute?

Table 4 Association of combined COMT/OPRM1 genotypes with incidence of CPP in 102 patients

Combined *COMT/OPRM1* genotypes	CPP	No CPP	Total
Val158Val (GG)/A118A	10	12	22 (21.6%)
Met158Val (GA)/A118A	14	30	44 (43.1%)
Met158Met (AA)/A118A	7	11	18 (17.6%)
Met158Val (GA) /A118G	2	7	9 (8.8%)
Met158Met (AA) /A118G	1	3	4 (3.9%)
Met158Val (GA) /G118G	1	1	2 (2.0%)
Val158Val (GG) /A118G	0	2	2 (2.0%)
Val158Val (GG) /G118G	0	1	1 (1.0%)
Met158Met (AA) /A118G	0	0	0 (0%)
Total	35	67	102

Note: Association of common combined genotypes (freq > 5%, first four rows) with the incidence of CPP was tested using a logistic regression analysis, after adjusting for age, gender and baseline pain score (P-value = 0.46).

ISSN: 1744-8069