Variable

Univariate Analysis

Multivariate Analysis

OR [95% CI]

p-value

aOR [95% CI]

p-value

Antepartum admission

2.60 [2.5 - 2.7]

<0.0001

2.13 [2.0 - 2.2]

<0.0001

Early postpartum admission (1 - 41 days)

4.74 [4.4 - 5.1]

<0.0001

3.86 [3.6 - 4.2]

<0.0001

Delivery < 28 weeks gestation^*

2.42 [2.1 - 2.8]

<0.0001

1.42 [1.23 - 1.65]

<0.0001

Cesarean delivery

1.21 [1.17 - 1.25]

<0.0001

1.06 [1.01 - 1.11]

0.013

Black race^**

1.61 [1.51 - 1.70]

<0.0001

1.27 [1.19 - 1.35]

0.0001

Pre-existing diabetes

3.09 [2.7 - 3.6]

<0.0001

2.11 [1.81 - 2.4]

<0.0001

Gestational diabetes

1.29 [1.20 - 1.39]

<0.0001

1.24 [1.15 - 1.34]

<0.0001

Hypertensive disorders of pregnancy

1.44 [1.25 - 1.53]

<0.0001

1.11 [1.03 - 1.18]

0.0035

Maternal age > 40 years

1.25 [1.13 - 1.39]

<0.0001

1.27 [1.13 - 1.41]

<0.0001

Maternal age < 20 years

1.31 [1.26 - 1.36]

<0.0001

1.18 [1.13 - 1.23]

<0.0001