Prognosis and Prognostic Factors of Patients with Emergent Cerclage: A Japanese Single-Center Study

Table 4

Multivariate analysis of risk factors among SPTBs less than 34 weeks.

	Odds ratio (95% CI)	P value
Presurgical CL 0 mm	5.30 (1.58–17.7)	0.007
History of SPTB	4.65 (1.38–15.7)	0.013
Presence of sludge in ultrasound	4.14 (1.20–14.3)	0.025

CL; cervical length, SPTB, spontaneous preterm birth.