Table 5.

Duration of time until cesarean decision by maternal race and ethnicity in nulliparous cohort

	Non- Hispanic white	Non-Hispanic Black		Asian		Hispanic
	Adjusted mean (95%CI)*	Adjusted mean (95%CI)*	P	Adjusted mean (95%CI)*	P	Adjusted mean (95%CI)*	P
Hours from oxytocin or rupture of membranes (whichever came last) to cesarean decision†	9.50 (8.06–10.94)	9.36 (7.74–10.98)	.82	10.15 (7.76–12.54)	.52	9.19 (7.40–10.98)	.67
Hours from 5 cm to cesarean decision‡	7.9 (7.3–8.5)	8.4 (7.7–9.1)	.02	8.6 (7.8–9.4)	.02	8.8 (8.1–9.5)	<.001
Hours from complete dilation to cesarean decision§	2.96 (2.63–3.28)	2.88 (2.47–3.29)	.63	2.68 (2.29–3.06)	.03	2.78 (2.41–3.16)	.16

CI, confidence interval

^*Comparisons of least squares means based on multivariable linear regression. Compared with non-Hispanic white women. Adjusted for age, BMI, diabetes, smoking, chorioamnionitis, gestational hypertension or preeclampsia, gestational age at delivery, and hospital.

^†In patients who were induced, received oxytocin, did not reach 5 cm dilation, and underwent cesarean for an indication of failed induction (n=908; n=838 with complete covariable data).

^‡In patients who reached 5 cm dilation but did not reach complete dilation, and underwent cesarean for an indication of arrest of labor (n=2472; n=2454 with complete covariable data).

^§In patients with who reached complete dilation, and underwent cesarean for an indication of arrest of descent (n=1533; n=1366 with complete covariable data).