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Table 2 Adjusted odds ratios and 95 % confidence intervals (CI) expressing the association between maternal and infant characteristics and early (<32 weeks) and late (≥39 weeks) gestation respiratory distress syndrome (RDS), United States, 2005–2006

From: Heterogeneity of respiratory distress syndrome: risk factors and morbidity associated with early and late gestation disease

 

Adjusted odds ratios [95 % CI]

RDS <32 weeks

RDS ≥39 weeks

Maternal age

<20 years

1.59 [1.48, 1.71]

1.25 [1.14, 1.37]

20–34

Reference

Reference

≥35

0.99 [0.97, 1.01]

0.95 [0.92, 0.98]

Multifetal gestation

11.6 [11.0, 12.2]

3.66 [2.68, 4.98]

Smoking

1.53 [1.43, 1.63]

1.44 [1.32, 1.57]

Diabetes

1.31 [1.18, 1.44]

1.74 [1.51, 2.00]

Chronic hypertension

3.89 [3.49, 4.35]

1.65 [1.25, 2.20]

Any congenital anomaly

9.41 [8.79, 10.1]

7.25 [6.50, 8.09]

Male sex

1.09 [1.04, 1.14]

1.45 [1.36, 1.54]

  1. Odds ratios were estimated by contrasting the outcome among those with and those without the risk factor e.g., RDS < 32 weeks among infants of smokers vs non-smokers
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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