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Table 3 Association of COMT rs4680 or OPRM1 rs1799971 genotypes with pain score or duration of pain (days) in 35 CPP patients

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

 

COMT rs4680

OPRM1 rs1799971

P-value (COMT, OPRM1)

 

Val158Val (GG; n = 10)

Val158Met (GA; n= 17)

Met158Met (AA; n = 8)

A118A (n = 31)

A118G (n = 3)

G118G (n = 1)

Additive

Dominant

Recessive

Pain Score

3.8 ± 1.2

4.0 ± 1.5

3.3 ± 1.7

3.5 ± 1.3

5.3 ± 2.3

6

0.30, 0.02

0.27, 0.02

0.57, NA

Duration

11.1 ± 10.5

11.7 ± 15.3

6.5 ± 2.3

10.3 ± 12.1

13.0 ± 14.9

3

0.44, 0.37

0.48, 0.60

0.57, NA

  1. Data are expressed as mean ± SD.
  2. P-value was from the ANCOVA of CPP score (or duration of pain) after adjusting for pain medication, age, sex, and baseline pain score, assessing additive, dominant, and recessive genetic model of two SNPs. Recessive effect of G allele for rs179991 was not assessed as there was only patient with G118G.