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Table 3 VAS and morphine use for the three OPRM A118A>G genotypic groups

From: Ethnicity and OPRM variant independently predict pain perception and patient-controlled analgesia usage for post-operative pain

VAS (average)*

Chinese (n = 617)

Malays (n = 241)

Indians (n = 136)

All (n = 994)

AA (n = 389)

0.29 (0.29)

0.43 (0.36)

0.71 (0.36)

0.29 (0.29)

AG (n = 435)

0.43 (0.43)

0.36 (0.29)

0.71 (0.43)

0.43 (0.36)

GG (n = 170

0.43 (0.36)

0.43 (0.29)

0.71 (0.50)

0.43 (0.36)

Morphine/kg bodyweight (× 100)*

AA (n = 389)

4.6 (4.4)

8.1 (6.6)

15.9 (11.7)

5.8 (5.7)

AG (n = 435)

6.6 (7.3)

8.7 (7.8)

15.6 (11.2)

8.8 (8.2)

GG (n = 170)

8.8 (9.3)

10.6 (10.4)

18.2 (15.5)

10.9 (10.3)

  1. *Median and semi-interquartile range