Table 5. Odds ratios for receipt of late prenatal care by study group, unadjusted and adjusted for selected maternal characteristics: California, October 1983.
| Predictor variable | Medicaid | Non-Medicaid | |||||
|---|---|---|---|---|---|---|---|
|
|
|
||||||
| Group 11 | Group 22 | Group 33 | Group 44 | ||||
|
|
|
|
|
||||
| Odds ratio | 95-percent confidence interval | Odds ratio | 95-percent confidence interval | Odds ratio | 95-percent confidence interval | Odds ratio | |
| Unadjusted | 7.78 | 6.31-9.60 | 5.06 | 4.16-6.16 | 4.75 | 3.89-5.81 | 1.0 |
| Adjusted for race and ethnicity | 6.84 | 5.52-8.46 | 4.47 | 3.66-5.46 | 3.94 | 3.21-4.84 | 1.0 |
| Adjusted for race and ethnicity, maternal age, and parity | 6.13 | 4.95-7.61 | 3.80 | 3.10-4.65 | 3.71 | 3.02-4.56 | 1.0 |
| Adjusted for race and ethnicity, maternal age, parity, and complications of pregnancy | 6.13 | 4.94-7.60 | 3.79 | 3.09-4.64 | 3.68 | 2.99-4.52 | 1.0 |
1
Enrolled 0-3 months of pregnancy.
2
Enrolled 4 or more months of pregnancy.
3
Residents of low-income areas.
4
Residents of high-income areas.
NOTES: When the 95-percent confidence interval for a given odds ratio excludes 1.0, the difference between the corresponding study group and Group 4 is statistically significant at the 0.05 level or less. Deliveries with missing data were excluded.