TABLE 3.
Frequency and adjusted ORs of conditions associated with labor/delivery at time of induction compared to delivery at later GA
| Variable | aORa | 95% CI | |
|---|---|---|---|
| Labor dystocia | |||
| 39 wk’ GA | |||
| Induction (n = 24,006) | 5.93% | 0.88 | 0.84–0.94 |
| Expectant (n = 178,413) | 6.71% | Referent | |
| 40 wk’ GA | |||
| Induction (n = 30,331) | 7.21% | 0.81 | 0.78–0.86 |
| Expectant (n = 48,727) | 8.81% | Referent | |
| 41 wk’ GA | |||
| Induction (n = 17,450) | 9.82% | 0.94 | 0.64–2.22 |
| Expectant (n = 2746) | 12.4% | Referent | |
| Fetal intolerance of labor | |||
| 39 wk’ GA | |||
| Induction (n = 24,006) | 6.15% | 0.86 | 0.81–0.92 |
| Expectant (n = 178,413) | 7.12% | Referent | |
| 40 wk’ GA | |||
| Induction (n = 30,331) | 8.00% | 0.99 | 0.93–1.04 |
| Expectant (n = 48,727) | 8.18% | Referent | |
| 41 wk’ GA | |||
| Induction (n = 17,450) | 9.12% | 1.15 | 0.99–1.33 |
| Expectant (n = 2746) | 8.41% | Referent | |
| Chorioamnionitis | |||
| 39 wk’ GA | |||
| Induction (n = 42,936) | 2.52% | 0.71 | 0.67–0.77 |
| Expectant (n = 279,706) | 3.54% | Referent | |
| 40 wk’ GA | |||
| Induction (n = 52,606) | 3.20% | 0.78 | 0.73–0.83 |
| Expectant (n = 75,218) | 4.13% | Referent | |
| 41 wk’ GA | |||
| Induction (n = 28,470) | 4.45% | 1.08 | 0.96–1.27 |
| Expectant (n = 4772) | 4.30% | Referent |
aOR, adjusted odds ratio; CI. confidence interval; GA, gestational age.
a
Multivariable logistic regression controlling for: maternal age, race/ethnicity, number of prenatal care visits, gestational weight gain, cigarette smoking during pregnancy, education; referent comparison group composed of women who did not have induction of labor (ie, expectantly managed) and delivered at later GA.
Source: National Center for Health Statistics (2005).19