. Author manuscript; available in PMC: 2020 Jul 1.

Published in final edited form as: J Matern Fetal Neonatal Med. 2018 Jan 23;32(13):2143–2151. doi: 10.1080/14767058.2018.1427719

Table 4:

Delivery Outcomes Stratified by Potential Cerclage Indication (excluded history-only indicated cerclages)

Variable	No Cerclage n=37	Cerclage n=90	P
Spontaneous PTB
sPTB <32w
US indicated (all)^*	3/20 (15.0%)	4/36 (11.1%)	0.691
US indicated (<1.5cm)	5/15 (33.3%)	4/20 (20%)	0.451
PE indicated	7/17 (41.2%)	6/54 (11.1%)	0.01
sPTB <34w
US indicated (all)^*	6/20 (30.0%)	8/36 (22.2%)	0.536
US indicated (<1.5cm)	10/15 (66.7%)	6/20 (30%)	0.055
PE indicated	10/17 (58.8%)	16/54 (29.6%)	0.043
sPTB <36w
US indicated (all)^*	9/20 (45%)	12/36 (33.3%)	0.405
US indicated (<1.5cm)	11/15 (73.3%)	9/20 (45%)	0.167
PE indicated	13/17 (76.4%)	26/54 (48.1%)	0.055
PTB (all indications)
PTB <32w
US indicated (all)^*	5/20 (25%)	7/36 (19.4%)	0.737
US indicated (<1.5cm)	7/15 (46.7%)	6/20 (30%)	0.481
PE indicated	8/17 (47.1%)	9/54 (16.7%)	0.02
PTB <34w
US indicated (all)^*	9/20 (45.0%)	12/36 (33.3%)	0.405
US indicated (<1.5cm)	12/15 (80%)	8/20 (40%)	0.055
PE indicated	13/17 (76.5%)	19/54 (35.2%)	0.005
PTB <36w
US indicated (all)^*	14/20 (70.0%)	24/36 (66.7%)	1.00
US indicated (<1.5cm)	14/15 (93.3%)	15/20 (75%)	0.207
PE indicated	17/17 (100%)	33/54 (61.1%)	0.002

P-values are from Fisher exact test. Significant values (p<0.05) are indicated in bold.

US, ultrasound; PE, physical exam; sPTB, spontaneous preterm birth; PTB, preterm birth; w, weeks.

Includes all CL<2.5cm