Polymorphism of μ-Opioid Receptor Gene (OPRM1:c.118A>G) Might Not Protect against or Enhance Morphine-Induced Nausea or Vomiting

Table 5

Test for Hardy-Weinberg equilibrium.

	The observed frequency	The expected frequency in a state of Hardy-Weinberg equilibrium	P value
Genotype
A/A	56 (43.4%)	55.4 (42.9%)	0.969
A/G	57 (44.2%)	58.3 (45.2%)
G/G	16 (12.4%)	15.4 (11.9%)