Functional Polymorphisms of Matrix Metalloproteinases 1 and 9 Genes in Women with Spontaneous Preterm Birth

Table 6

Genotype and allele frequencies of MMP-1-1607 1G/2G and MMP-9-1562 C/T gene polymorphisms in women with SPTB according to gestational age at delivery.

Gene polymorphism	<33 weeks; (); (%)	34–37 weeks; (); (%)	Chi square	value
MMP-1-1607
2G2G	6 (20.7)	17 (21.5)	0.29	0.864
1G2G	18 (62.1)	45 (57.0)
1G1G	5 (17.2)	17 (21.5)
2G	30 (51.7)	79 (50.0)	0.05	0.822
1G	28 (48.3)	79 (50.0)
MMP-9-1562
CC	23 (79.3)	60 (75.9)	0.13	0.714
CT	6 (20.7)	19 (24.1)
TT	0 (0)	0 (0)
C	52 (89.7)	139 (88.0)	0.12	0.732
T	6 (10.3)	19 (12.0)