Table 3.

Factors associated with delayed delivery

Characteristics	Beta	Standard error	P value
Combination therapy	-5.819	0.760	0.001
Age	-0.010	0.077	0.898
Parity	-1.017	1.189	0.394
Body mass index	-0.143	0.108	0.191
History of preterm labor	-0.761	1.056	0.472
Gestational age	0.141	0.136	0.302
Cervical length	-0.295	0.103	0.005