Table 6.

Multivariable Predictive Model (white lines) and Internal Validation Model (gray lines) using Table 4 (not inclusive of thromboembolic disorder)

Predictor Variable	Adjusted OR (95% CI)	p-value
Mode of delivery (cesarean vs vaginal delivery)	1.86 (1.21 – 2.85)	<0.001*
	1.86 (1.79 – 1.94)	<0.001*
BMI (admission) per 5 unit increase	1.25 (1.09 – 1.42)	<0.001*
	1.22 (1.21 – 1.24)	<0.001*
Gestational age, per 1 week increase	0.93 (0.87 – 0.99)	0.014*
	0.93 (0.92 – 0.93)	<0.001*
Pre-gestational diabetes	2.31 (1.21 – 4.42)	0.011*
	2.36 (2.22 – 2.50)	<0.001*
Chronic heart disease	3.87 (1.86 – 8.06)	<0.001*
	3.82 (3.58 – 4.09)	<0.001*
Preeclampsia	1.71 (1.01 – 2.90)	0.046*
	1.70 (1.62 – 1.79)	<0.001*
Blood transfusion (intrapartum or postpartum)	3.18 (1.74 – 5.83)	<0.001*
	3.25 (3.08 – 3.43)	<0.001*
Drug use during pregnancy	2.87 (1.29 – 6.42)	0.010*
	2.95 (2.75 – 3.17)	<0.001*
Postpartum maternal length of stay, per 1 day increase	1.07 (1.05 – 1.09)	<0.001*
	1.07 (1.06 – 1.07)	<0.001*

^*p<.05, statistically significant