Table 2 |
|||
| Adjusted odds ratios for risk of PTB by demographic and perinatal characteristics, New Mexico, 1991-2005 | |||
| Adjusted Odds Ratio | 95% Confidence Interval | p value | |
| Maternal Age | |||
| Reference age = 25-29 | |||
| Age Group | |||
| <15 | 1.9 | 1.47-2.46 | <0.0001 |
| 15-19 | 1.22 | 1.15-1.30 | <0.0001 |
| 20-24 | 1.07 | 1.02-1.13 | 0.0059 |
| 30-34 | 1.09 | 1.03-1.15 | 0.0037 |
| 35-39 | 1.25 | 1.17-1.35 | <0.0001 |
| >40 | 1.34 | 1.18-1.52 | <0.0001 |
| Maternal Education Level | |||
| Reference education level = 9-12 years | |||
| Number of years | |||
| <9 | 0.995 | 0.92-1.07 | 0.91 |
| 13-16 | 0.89 | 0.85-0.93 | <0.0001 |
| >16 | 0.82 | 0.76-0.89 | <0.0001 |
| Maternal Ethnicity | |||
| Reference ethnicity = White Non-Hispanic | |||
| Asian | 1.23 | 1.05-1.43 | 0.0087 |
| Other | 1.49 | 0.76-2.92 | 0.2452 |
| White Hispanic | 1.05 | 1.00-1.10 | 0.0372 |
| Native American | 0.88 | 0.82-0.95 | 0.0016 |
| Black | 1.37 | 1.22-1.54 | <0.0001 |
| Normal Risk Pregnancy and Level of Prenatal Care | |||
| Reference level of care = Kotelchuck adequate | |||
| Kotelchuck Index | |||
| None | 4.92 | 4.53-5.34 | <0.0001 |
| Inadequate | 2.16 | 2.02-2.30 | <0.0001 |
| Intermediate | 0.93 | 0.85-1.01 | 0.0728 |
| High | 4.95 | 4.66-5.25 | <0.0001 |
| High Risk Pregnancy and Level of Prenatal Care | |||
| Kotelchuck Index | |||
| None | 14.66 | 12.92-16.64 | <0.0001 |
| Inadequate | 4.78 | 4.34-5.26 | <0.0001 |
| Intermediate | 2.59 | 2.26-2.97 | <0.0001 |
| Adequate | 2.31 | 2.08-2.56 | <0.0001 |
| High | 8.42 | 7.83-9.05 | <0.0001 |
Gwin et al. BMC Pregnancy and Childbirth 2012 12:53 doi:10.1186/1471-2393-12-53
