Table 2—

Genotype frequencies for surfactant protein B single nucleotide polymorphisms(SNPs) in 389 non-Hispanic white chronic obstructive pulmonary disease subjects

SNP	Genotype	Count	Frequency
rs2118177	C/C	55	0.14
	T/C	159	0.42
	T/T	166	0.44
rs2304566	G/G	28	0.07
	A/G	139	0.37
	A/A	214	0.56
rs1130866	T/T	113	0.29
	T/C	189	0.49
	C/C	85	0.22
rs2077079	C/C	52	0.14
	A/C	176	0.47
	A/A	143	0.39
rs3024791	G/G	276	0.73
	G/A	94	0.25
	A/A	9	0.02

Genotype counts do not sum to 389 due to the following missing genotypes: nine for rs2118177, eight for rs2304566, two for rs1130866, eight for rs2077079 and 10 for rs3024791.