Table 2

Table 2: Associations between subjects with assisted reproductive technology and antepartum obstetrical and medical complications.

Obstetrical and medical complication	Rate per 100 of morbidity unless otherwise specified (n^o. of cases)		Crude odds ratio (95% confidence interval)	P-value	Adjusted odds ratio (95% confidence interval)*	P-value
	ART absent (n=406,334)	ARTpresent (n=551)

Preterm delivery

6.2 (25,152)

18.5 (102)

3.4 (2.8-4.3)

<.001

0.7 (0.7-1.2)

0.65

Gestational diabetes

7.3 (29,603)

13.4 (74)

2.0 (1.5-2.5)

<.001

1.1 (0.8-1.4)

0.65

Urinary tract infection

1.2 (4,680)

2.7 (15)

2.4 (1.4-.0)

.001

1.7 (1.0-2.9)

0.05

Gestational hypertension

2.2 (8,871)

3.6 (20)

1.7 (1.1-2.6)

0.02

1.1 (0.7-1.7)

0.84

Mild Preeclampsia

1.9 (7,847)

5.3 (29)

2.8 (1.9-4.1)

<.001

1.5 (1.0-2.2)

0.04

Severe preeclampsia

1.0 (4,172)

3.1 (17)

3.1 (1.9-5.0)

<.001

1.3 (0.8-2.1)

0.35

Abruption (cases per 1,000)

9.1 (3,682)

30.9 (17)

3.5 (2.1-5.6)

<.001

2.4 (1.5-4.0)

<.001

Placenta previa (cases per 1,000)

7.6 (3,106)

34.4 (19)

4.6 (2.9-7.3)

<.001

1.8 (1.1-2.9)

.02

Oligohydramnios

2.7 (10,981)

4.2 (23)

1.6 (1.0-2.4)

0.03

1.5 (1.0-2.3)

0.06

Fetal growth restriction

1.4 (5,560)

5.3 (29)

4.0 (2.8-5.8)

<.001

1.6 (1.1-2.3)

0.02

Chorioamnionitis

1.9 (7,764)

3.1 (17)

1.6 (1.0-2.7)

0.04

1.7 (1.1-2.8)

0.03

Obstructed labor

3.0 (12,057)

8.0 (44)

2.8 (2.1-3.9)

<.001

1.7 (1.2-2.3)

<.001

Cesarean delivery

31.7 (128,780)

54.8 (302)

2.6 (2.2-3.1)

<.001

1.2 (1.0-1.4)

.05

Manual placenta extraction (per 1,000)

5.7 (2,305)

16.3 (9)

2.9 (1.5-5.6)

.001

2.1 (1.1-4.1)

.03

Postpartum hemorrhage

2.4 (9,817)

6.4 (35)

2.7 (1.9-3.9)

<.001

1.8 (1.2-2.5)

.002

* = adjusted for age, race/ethnicity, insurance type, year of delivery, chronic hypertension, diabetes, obesity, thyroid disease, and multiple gestations (unless variable being adjusted for is outcome itself).