Table 3. Odds of Epidural Use According to Foreign Birth Status Stratified by Maternal Race in Washington State in 2009 .
| Foreign Birth Stratum | Adjusted OR (95% CI)a |
|---|---|
| All | |
| US-Born | Referent |
| Foreign-born | 0.51 (0.49, 0.53) |
| Non-Hispanic White | |
| US-Born | Referent |
| Foreign-born | 0.52 (0.49, 0.56) |
| Non-Hispanic Black | |
| US-Born | Referent |
| Foreign-born | 0.35 (0.29, 0.43) |
| Hispanic | |
| US-Born | Referent |
| Foreign-born | 0.68 (0.59, 0.78) |
| Asian | |
| US-Born | Referent |
| Foreign-born | 0.96 (0.82, 1.12) |
aAdjusted for maternal age, insurance, and hospital ownership. Robust multivariate logistic regression was used to determine odds ratios and confidence intervals.