Table 5.
Unadjusted and Adjusteda Odds Ratios of Cesarean in Non-Interprofessionalb Centers Within the Robson 10 Categories
| Robson Category | Unadjusted |
Adjusteda |
||
|---|---|---|---|---|
| OR (95% CI) | P Value | aOR (95% CI) | P Value | |
| 1 | 0.94 (0.87–1.03) | .165 | 1.33 (1.18–1.5) | <.001 |
| 2ac | 0.84 (0.79–0.9) | <.001 | 1.21 (1.12–1.32) | <.001 |
| 3 | 1.21 (1.04–1.41) | .013 | 1.26 (1.00–1.57) | .05 |
| 4ac | 0.88 (0.79–0.97) | .013 | 1.23 (1.06–1.42) | .005 |
| 5 | 2.03 (1.85–2.23) | <.001 | 1.73 (1.51–1.99) | <.001 |
| 6 | NAd | NAd | ||
| 7 | NAe | NAe | ||
| 8 | 1.52 (1.27–1.82) | <.001 | 1.59 (1.23–2.06) | <.001 |
| 9 | NAf | NAf | ||
| 10 | 1.18 (1.09–1.29) | <.001 | 1.45 (1.28–1.64) | <.001 |
| Cesarean Total | 1.42 (1.38–1.46) | <.001 | 1.62 (1.56–1.68) | <.001 |
Abbreviations: aOR, adjusted odds ratio; NA, not applicable; OR, odds ratio.
Adjusted for site and center, year of birth, race and ethnicity, diabetes, chronic hypertension or gestational hypertension, heart disease, renal disease, depression, anemia, and body mass index on admission for birth.
Reference group: interprofessional group, which includes centers with midwifery presence. Non-interprofessional group includes centers without midwifery presence.
Only births with induced labor (categories 2a and 4a) were included for regression analysis. Prelabor cesarean births (2b and 4b) were excluded in the regression analysis.
Only 20 (<0.01%) vaginal births in this group among everyone.
Only 65 (<0.01%) vaginal births in this group among everyone.
Only one vaginal birth in this group among everyone.