Table 4.

Allele frequencies of serpin family E member 1 (SERPINE1) -844 and -675 polymorphisms in patients with chronic obstructive pulmonary disease (COPD, n = 140) and healthy smoking controls (n = 100).

		Study group			Statistical significance
Polymorphism	Allele	COPD	Control	χ 2		OR	95% CI
SERPINE1 -844	A	105 (37.5)	77 (38.5)	0.05	NS	0.96	0.66, 1.39
	G	175 (62.5)	123 (61.5)
SERPINE1 -675	4G	175 (62.5)	107 (53.5)	3.90	P = 0.04	1.45	1.00, 2.09
	5G	105 (37.5)	93 (46.5)

Data presented as n (%) prevalence.

OR, odds ratio; CI, confidence interval.

NS, no statistically significant between-group difference (P > 0.05; χ²-test).