Table 3.

Univariable and multivariable Cox proportional hazards results of time to sterilization fulfillment within 90 days postpartum predicted by clinical and demographic characteristics.

	Univariable Hazard Ratio	Confidence Interval	Multivariable Hazard Ratio	Confidence Interval
Private Insurancea	1.71	1.38 – 2.12	1.03	0.79 – 1.34
Mean maternal Age at Deliveryb	1.03	1.01 – 1.04	1.02	1.00 – 1.03
Parity ≥2c	0.97	0.80 – 1.18	1.43	1.16 – 1.76
Gestational Age at Deliveryb	1.04	1.00 – 1.07	1.06	1.02 – 1.11
Cesarean Sectiond	7.83	6.52 – 9.39	9.19	7.55 – 11.19
Adequate Prenatal Caree	2.24	1.74 – 2.89	2.23	1.69 – 2.95
Black/African Americanf	0.76	0.64 – 0.89	0.83	0.67 – 1.02
Hispanicf	1.16	0.93 – 1.44	1.19	0.93 – 1.53
Asian/Other Racef	1.02	0.63 – 1.65	0.77	0.49 – 1.21
Marriedg	1.87	1.56 – 2.24	1.33	1.07 – 1.65
College Educationh	1.24	1.04 – 1.48	1.09	0.89 – 1.33

All variables shown in the table were included in the multivariable model

^aReferent group – Medicaid insurance

^bAnalyzed continuously

^cReferent group – Parity <2

^dReferent group – Spontaneous or operative vaginal delivery

^eReferent group – Inadequate prenatal care (fewer than 6 prenatal visits)

^fReferent group – White

^gReferent group – Unmarried

^hReferent group – No college education