Table 4

Comparison of (A) the incidence of respiratory distress syndrome and (B) surfactant use between 1st and 2nd born twin siblings at different gestations

Gestation (weeks) Number of twin pairs 2nd born
twin only
1st born
twin only
Odds ratio
(95% CI)
p Value
A
23–2537331.0 (0.13 to 7.5)1.0
26–2756531.7 (0.32 to 11)0.7
28–29601142.8 (0.82 to 12)0.1
30–311182254.4 (1.6 to 15)0.002
B
23–2539632 (0.43 to 12)0.5
26–2760832.7 (0.64 to 16)0.2
28–29661434.7 (1.3 to 25)0.01
30–311312573.6 (1.5 to 9.8)0.002