. Author manuscript; available in PMC: 2015 Mar 14.

Published in final edited form as: Am J Perinatol. 2013 Dec 11;31(8):717–726. doi: 10.1055/s-0033-1359723

Table IV.

Elevated Umbilical Cord Serum Concentrations at Birth of Analytes (IL-6, CRP and MPO) and Risk of Preterm Birth <32 Weeks of Gestation.

Analyte	>75^th Percentile (concentration)	Percent Delivery <32 Weeks (cases/total)	P-value
IL-6	No	19.2% (51/266)	0.002
IL-6	Yes (>33.6 pg/ml)	34.1% (31/89)	0.002
CRP N=355	No	19.6% (52/265)	0.008
CRP N=355	Yes (>221.2 ng/ml)	33.3% (30/90)	0.008
MPO N=355	No	19.7% (52/264)	0.01
MPO N=355	Yes (> 181.5) ng/ml	32.2% (29/90)	0.01

IL-6, interleukin-6; CRP, C-reactive protein; MPO, myeloperoxidase