Table 3.

Adjusted^* logistic regression per unit increase in the Bishop and Cervial Scores for the outcome of SPTD at < 32, < 35, and < 37 weeks’ gestation.

	Bishop Score		Cervical Score
22–24 wks	p-value	OR (95% CI)	p-value	OR (95%) CI)
SPTD <32 wks	<0.0001	1.59 (1.33–1.89)	0.0010	0.58 (0.42–0.80)
SPTD <35 wks	<0.0001	1.46 (1.29–1.65)	<0.0001	0.62 (0.50–0.78)
SPTD <37 wks	<0.0001	1.29 (1.18–1.41)	0.0006	0.76 (0.65–0.89)
26–29 wks
SPTD <32 wks	0.0806	1.24 (0.97–1.58)	0.0007	0.52 (0.36–0.76)
SPTD <35 wks	<0.0001	1.43 (1.25–1.64)	<0.0001	0.47 (0.37–0.60)
SPTD <37 wks	<0.0001	1.28 (1.17–1.39)	<0.0001	0.64 (0.54–0.75)

^*Adjusted for body mass index, black race, and previous preterm delivery.