Table 2 Crude and adjusted odds ratios of mortality for infants conceived with fertility treatment (ART/NIFT) vs. spontaneous conception stratified by socioeconomic status (SES).

From: The effect of fertility treatment and socioeconomic status on neonatal and post-neonatal mortality in the United States

 

Overall

High SES

Low SES

 

Infant Mortality

Neonatal Mortality

Post-neonatal Mortality

Infant Mortality

Neonatal Mortality

Post-neonatal Mortality

Infant Mortality

Neonatal Mortality

Post-neonatal Mortality

OR (CI)

OR (CI)

OR (CI)

OR (CI)

OR (CI)

OR (CI)

OR (CI)

OR (CI)

OR (CI)

Crude OR

ART/NIFTb

2.06

2.76

0.68

3*

3.59**

1.34***

2.94*

4.39**

0.76***

(1.99, 2.13)

(2.66, 2.86)

(0.62, 0.75)

(2.87, 3.14)

(3.42, 3.77)

(1.18, 1.53)

(2.56, 3.37)

(3.81, 5.07)

(0.5, 1.15)

Adjusted ORa

ART/NIFTb

1.47

1.61

0.86

1.42

1.59

0.87

1.67

2.11

0.60

(1.42, 1.53)

(1.54, 1.68)

(0.77, 0.95)

(1.35, 1.5)

(1.5, 1.68)

(0.76, 0.996)

(1.43, 1.94)

(1.79, 2.48)

(0.38, 0.95)

  1. Bolded values are statistically significant (p < 0.05).
  2. *p-value for interaction term ART/NIFT * SES = 0.77.
  3. **p-value for interaction term ART/NIFT * SES = 0.01.
  4. ***p-value for interaction term ART/NIFT * SES = 0.01.
  5. aModels adjusted for maternal age, maternal race, maternal BMI, maternal smoking, plurality (single vs multiple gestation), prenatal care, mode of delivery, prematurity, IUGR (using z-score for birth weight).
  6. bReference group for all models was “Spontaneously conceived infants”.
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