Table 1

Table 1: Baseline characteristics between subjects with pregnancies conceived by assisted reproductive technology (ART) compared to others.

Baseline Characteristic	Subjects with ART (n=406,334)	Subjects without ART technology (n=551)	Odds Ratio	P-value
	n (prevalence)	n (prevalence)	Odds Ratio	P-value

Age (years)

15-24

125,111 (30.8%)

3 (0.5%)

.01 (.00-.04)

<.001

25-34

212,260 (52.2%)

197 (35.8%)

0.51 (0.4-0.6)

<.001

35-44

68,240 (16.8%)

316 (57.4%)

6.7 (5.6-8.0)

<.001

45+

723 (0.2%)

35 (6.4%)

38.1 (26.8-54.0)

<.001

Advanced Maternal Age (≥35 years)

68,963 (17.0%)

351 (63.7%)

8.6 (7.2-10.2)

<.001

Race/Ethnicity

Caucasian

141,791 (34.9%)

362 (65.7%)

3.6 (3.0-4.3)

<.001

Black

19,545 (4.8%)

13 (2.4%)

0.5 (0.3-0.8)

.007

Native American/ Eskimo/Aleut

507 (0.1%)

0 (0%)

Asian / Pacific Islander

40,140 (9.9%)

132 (24.0%)

2.9 (2.4-3.5)

<.001

Hispanic

204,351 (50.3%)

44 (8.0%)

0.09 (0.06-0.1)

<.001

Insurance type

Government/State

208,801 (51.4%)

23 (4.2%)

0.04 (0.03-0.06)

<.001

Private

184,727 (45.5%)

517 (93.8%)

18.2 (12.9-25.8)

<.001

Other

12,800 (3.2%)

11 (2.0%)

0.6 (0.4-1.1)

0.12

Length of stay (days)

2.6 ± 2.2

4.6 ± 6.4

<.001

Diabetes

33,779 (8.3%)

79 (14.3%)

1.0 (0.8-1.2)

0.99*

Cardiac diesase

2499 (0.6%)

9 (1.6%)

1.09 (0.6-2.1)

0.80*

Obesity

16,310 (4.0%)

37 (6.7%)

1.8 (1.2-2.5)

.002*

Thyroid disease

7,521 (1.9%)

49 (8.9%)

2.0 (1.5-2.7)

<.001*

Chronic hypertension

5,719 (1.4%)

19 (3.4%)

1.1 (0.7-1.7)

0.86*

Multiple gestations

7,877 (1.9%)

242 (43.9%)

22.4 (18.7-26.7)

<.001*

Higher order multiples (triplets or higher)

379 (0.1%)

42 (7.6%)

39.3

<.001*

*=conditions adjusted via logistic regression for age, race, diabetes, cardiac disease, obesity, thyroid disease, chronic hypertension, multiple gestations (unless variable being adjusted for is the condition itself)