Table 2  Multivariable regression of factors associated with Respiratory Distress Syndrome development

Maternal Age

1.01 (1.00-1.02)

1.01 (0.99-1.02)

1.01 (1.00-1.02)

1.01 (0.98-1.04)

1.00 (0.99-1.01)

Maternal BMI^c at Dosing

1.00 (0.99-1.01)

1.00 (0.99-1.01)

1.00 (0.99-1.01)

1.00 (0.98-1.02)

1.00 (0.99-1.01)

Maternal Ethnicity, Hispanic

1.08 (0.95-1.22)

1.09 (0.89-1.32)

1.09 (0.88-1.35)

1.06 (0.71-1.57)

1.03 (0.91-1.17)

 White or Caucasian

Reference

Reference

Reference

Reference

Reference

 Black or African American

0.99 (0.90-1.09)

0.97 (0.81-1.17)

0.97 (0.81-1.17)

0.87 (0.62-1.21)

0.97 (0.88-1.07)

 Other

0.89 (0.71-1.11)

0.76 (0.50-1.16)

0.76 (0.50-1.16)

0.49 (0.20-1.19)

0.90 (0.73-1.10)

Maternal Tobacco Use

1.03 (0.93-1.15)

1.04 (0.86-1.24)

1.05 (0.86-1.29)

1.23 (0.86-1.76)

1.03 (0.93-1.15)

Diabetes

0.92 (0.80-1.05)

1.03 (0.82-1.30)

1.12 (0.87-1.44)

1.08 (0.60-1.95)

0.92 (0.79-1.06)

Preeclampsia

1.07 (0.96-1.19)

1.08 (0.91-1.28)

1.04 (0.86-1.25)

1.05 (0.72-0.53)

1.06 (0.94-1.19)

Chronic Hypertension

1.06 (0.95-1.19)

1.09 (0.91-1.31)

1.08 (0.89-1.32)

1.22 (0.83-1.77)

1.11 (0.99-1.25)

PPROM^d

0.91 (0.78-1.06)

0.81 (0.67-0.99)

0.85 (0.68-1.08)

0.82 (0.56-1.20)

0.89 (0.76-1.04)

Days Between Last BMZ^f Dose and Delivery

1.00 (1.00-1.00)

1.00 (0.98-1.02)

0.99 (0.94-1.04)

1.02 (0.91-1.16)

1.00 (1.00-1.00)

Total Doses of BMZ

1.06 (0.99-1.13)

1.01 (0.92-1.12)

1.00 (0.89-1.11)

1.14 (0.91-1.41)

0.83 (0.66-1.05)

 Vaginal

Reference

Reference

 Cesarean without labor

1.14 (1.03-1.27)

1.13 (0.96-1.34)

1.14 (0.95-+1.38)

1.45 (1.07-1.98)

1.14 (1.03-1.27)

 Cesarean with labor

1.25 (1.07-1.46)

1.42 (1.13-1.79)

1.36 (1.05-1.78)

2.08 (1.16-3.72)

1.24 (1.02-1.50)