Table 3 Outcomes of <35 year-old smoking and ≥35 year-old smoking women

Preterm delivery (before 37 wk)

4425 (5.9%)

975(1.3%)

1.35, 1.25-1.45 (*1.29, *1.12-1.48)

SGA (<90^th percentile)

11430 (14.7%)

2043 (2.6%)

1.12, 1.07-1.19 (*1.18, *1.07-1.29)

Low birth weight (<2500 g)

4120(5.1%)

1027 (1.3%)

1.51, 1.41-1.62 (*1.50, *1.31-1.71)

Fetal death

273 (0.3%)

83 (0.1%)

1.87, 1.46-2.40 (*2.36, *1.49-3.73)

Low Apgar score (<7) at 1 min.

3589 (4.7%)

692 (0.9%)

1.17, 1.08-1.27 (*1.09, *0.94-1.27)

Preeclampsia

2400 (3.0%)

535 (0.7%)

1.37, 1.24-1.50 (*1.17, *0.98-1.39)