. Author manuscript; available in PMC: 2017 Oct 3.

Published in final edited form as: J Matern Fetal Neonatal Med. 2015 Dec 7;29(15):2414–2422. doi: 10.3109/14767058.2015.1094049

Table 2.

Clinical characteristics and pregnancy outcomes of 64 cases with spontaneous early preterm delivery (<30 weeks of gestation) according to results of the MMP-8 bedside test

Characteristic	MMP-8 bedside test Positive (n=27)	MMP-8 bedside test Negative (n=37)	P-value
Mean maternal age, years (±SD)	33.8 ± 4.5	35.6 ± 4.4	NS
Nulliparity	7 (25.9%)	8 (21.6%)	NS
History of spontaneous preterm delivery	1 (3.7%)	5 (13.5%)	NS
Median gestational age at amniocentesis, weeks (range)	18.0 (15.6–22.3)	17.6 (15.6–21.7)	NS
Median gestational age at delivery, weeks (range)	21.0 (16.6–29.6)	24.4 (17.2–29.7)	NS
Indication for delivery			NS
• Preterm labor	10 (37.0%)	17 (45.9%)
• PROM	15 (55.6%)	17 (45.9%)
• Cervical insufficiency	0 (0.0%)	3 (8.1%)
• Spontaneous abortion	2 (7.4%)	0 (0.0%)
Median amniocentesis-to-delivery interval, day (range)	16 (0–95)	42 (2–91)	0.011
• Time from amniocentesis to delivery ≤1week	6 (22.2%)	2 (5.4%)	NS
• Time from amniocentesis to delivery ≤2weeks	11 (40.7%)	2 (5.4%)	0.001
• Time from amniocentesis to delivery ≤4weeks	17 (63.0%)	9 (24.3%)	0.004

MMP = Matrix metalloproteinase; SD = Standard deviation; NS = Not significant; PROM = Premature rupture of the membranes

Data are presented as median (range) or n (%).