Table 3 Logistic regressions modeling effect of prenatal physical activity on VBAC [adjusted odds ratios (95% confidence intervals)]

  < 60 min/wk

Reference

 60–149 min/wk

1.09 (0.89–1.34)

 150+ min/wk

1.86 (1.69–2.07)*

 18–24

Reference

 25–29

1.12 (1.02–1.30)

 30–40

0.83 (0.73–0.94)*

 Less than 15 kg

Reference

 15–20 kg

1.04 (0.95–1.22)

 More than 20 kg

0.79 (0.68–0.92)*

 Vaginal delivery

Reference

 Previous indication for primary cesarean delivery

0.96 (0.77–1.22)

 Induction of labor

0.72 (0.61–0.91)*

  > 3500 g

Reference

  < 3500 g

1.55 (1.30–1.85)*