In contrast, for MMP-2 15918 T>C (rs243847), MMP-2 -753 C>T (rs2285053), MMP-7 -181 A>G (rs11568818), MMP-9 -1562 C>T (rs3918242) and MMP-9 R279Q (rs17576) polymorphisms, no association was found in overall comparison, but in subgroup analyses based on source of control, stage of endometriosis, or ethnicity.
In the two-locus haplotype analyses using the four single nucleotide polymorphisms (SNPs), an increase in the distribution of the R279Q/P574R (2678G>A/4859C>G) (AC haplotype: odds ratio [OR] = 3.180, 95% confidence interval [CI] = 1.956-5.170; GG haplotype: OR = 4.374, 95% CI = 2.376-8.053) and -1562C>T/R668Q (-1562C>T/5546G>A) (CA haplotype: OR = 3.280, 95% CI = 1.406-7.653) haplotypes was significantly associated with endometriosis.