Table 1.

Hardy-Weinberg equilibrium of the C/T polymorphism in MDR gene

		COPD		Control
	Genotype	Expected	Observed	Expected	Observed
Common homozygotes	CC	8.51	8	27.56	25
Heterozygotes	CT	22.98	24	28.88	34
Rare homozygotes	TT	15.51	15	7.56	5
		X2 = 0.09, p > 0.05		X2 = 2.02, p > 0.05