Table 4 Results from logistic regression analyses of histologic chorioamnionitis, maternal inflammatory response^a according to maternal and pregnancy characteristics in a prospective observational study of 315 singleton term placentas meeting the criteria for referral to histopathologic examination

Unadjusted models

Adjusted model^b

Characteristics

OR

95% CI

p-value

OR

95% CI

p-value

Mother not born in Norway

1.24

(0.49, 3.18)

0.658

Maternal age ≥ 35 years

0.72

(0.34, 1.52)

0.377

BMI ≥ 30 (kg/m²)

0.92

(0.33, 2.53)

0.871

Smoking

2.00

(0.52, 7.68)

0.340

Primiparity

2.86

(1.36, 5.99)

0.003

2.22

(1.01, 4.86)

0.039

Preeclampsia

0.51

(0.21, 1.26)

0.122

Severe preeclampsia^c

0.23

(0.03, 1.72)

0.073

Clinical chorioamnionitis

11.76

(4.28, 32.33)

< 0.001

5.97

(1.99, 17.91)

0.001

Pregestational diabetes

0.48

(0.06, 3.75)

0.436

Gestational diabetes

2.07

(0.71, 5.99)

0.206

PROM

1.89

(0.50, 7.18)

0.374

Emergency section

3.19

(1.68, 6.05)

< 0.001

2.05

(1.01, 4.15)

0.049

SGA < 5 percentile

0.55

(0.24, 1.29)

0.150

LGA > 90 percentile

1.61

(0.51, 5.09)

0.434

Male sex

1.35

(0.72, 2.54)

0.352

Gestation week^d

1.60

(1.27, 2.03)

< 0.001

1.45

(1.13, 1.87)

0.003