Inducible Nitric Oxide Synthase Genetic Polymorphism and Risk of Asbestosis

Table 1

Allele frequencies of the iNOS (CCTTT)_n gene polymorphism in cases and controls.

No. of CCTTT repeats	Size (bp)	Cases N (%)	Controls N (%)
6	166	1	1
7	171	1	2
8	176	0	2
9	181	20	22
10	186	72	71
11	191	75	82
12	196	193	173
13	201	93	96
14	206	32	33
15	211	24	31
16	216	3	3
17	221	2	1
18	226	0	1
≤11 (short alleles)		169	180
≥12 (long alleles)		347	338