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

Published in final edited form as: J Matern Fetal Neonatal Med. 2012 Apr 25;25(9):1690–1698. doi: 10.3109/14767058.2012.657279

Table 4.

Logistic regression analysis of Amnisure & Fibronectin tests in predicting Intra-amniotic Infection and/or Inflammation and Spontaneous Preterm Birth in patients with preterm labor and intact membranes

Test Result			Intra-amniotic infection and/or inflammation (n=27)		Spontaneous Preterm Delivery
			Intra-amniotic infection and/or inflammation (n=27)		< 35 weeks ^a (n=34)		< 37 weeks ^b (n=46)
			OR	CI	OR	CI	OR	CI
Amnisure Test (n=90)		(+)	3.9	1.01–15.1	2.7	0.7–10.3	3.6	0.6–20.6
Amnisure Test (n=90)		(−)	1		1		1
Fibronectin Test (n=64)		(+)	8.5	1.6–46.9	7.3	1.8–29.5	9.8	2.2–43.5
Fibronectin Test (n=64)		(−)	1		1		1
Fibronectin (+) (n=28)	Aminsure Test	(+)	0.5	0.06–5.3	0.4	0.1–2.2	2.3	0.2–28.1
Fibronectin (+) (n=28)	Aminsure Test	(−)	1		1		1
Fibronectin (−) (n=36)	Aminsure Test	(+)	25.2	1.7–363.8	66.7	2.8->999	10.7	0.97–117.9
Fibronectin (−) (n=36)	Aminsure Test	(−)	1		1		1

Note: All models adjusted for gestational length at time of test and cervical dilatation except those stratified by fibronectin result due to sample size restrictions;

Four patients who delivered preterm before (before 35 weeks) by augmentation of labor or cesarean delivery due to maternal- fetal indications were excluded from this analysis;

Nine patients who delivered preterm before 37 weeks by augmentation of labor or cesarean delivery due to maternal- fetal indications were excluded from this analysis.