. Author manuscript; available in PMC: 2013 Nov 1.

Published in final edited form as: J Perinatol. 2012 Sep 27;33(5):336–340. doi: 10.1038/jp.2012.118

Table 4.

Parent-of-origin specific effects for PTB infants

Gene	SNP	Allele	Paternal transmission	Paternal OR^a	Maternal transmission	Maternal OR^a	P-value^b
DEFA6	rs4458901	C	P=0.005	2.5	P=0.65	1.15	0.09
PGR	rs1042839	C	P=0.47	1.3	P=0.10	1.9	0.10
PTGIS	rs493694	G	P=0.18	1.8	P=0.03	0.90	0.07

Abbreviations: PTB, preterm birth; SNP, single-nucleotide polymorphism.

OR is odds ratio of having the associated allele versus the other allele.

Null hypothesis: paternal odds ratio=maternal odds ratio.