Table 2. Maternal, Societal, Behavioral and Obstetric Characteristics by Race Among Asian and Mixed-Race Infants, and Infants of Other or Unknown Race.
| N | Maternal and paternal race |
||||||
|---|---|---|---|---|---|---|---|
| Indian | Chinese | Korean | Japanese | Vietnamese | Filipino | Mixed, other or unknown race | |
| 135,502 | 93,805 | 27,219 | 6,171 | 43,437 | 43,317 | 3,868,775 | |
| Maternal characteristics | |||||||
| Age (yrs) [mean (SD)] | 30 (4) | 32 (5) | 33 (4) | 34 (4) | 32 (5) | 32 (5) | 26 (6) |
| BMI(kg/m2)[mean(SD)] | 24 (4) | 21 (3) | 22 (3) | 21 (3) | 21 (3) | 24 (4) | 27 (7) |
| Height(cm)[mean (SD)] | 161 (6) | 161 (6) | 162 (5) | 159 (6) | 157 (6) | 158 (6) | 162 (7) |
| Number of previous deliveries | |||||||
| 0 (%) | 50 | 49 | 48 | 49 | 42 | 39 | 37 |
| 1 (%) | 40 | 40 | 37 | 38 | 28 | 36 | 33 |
| 2<= (%) | 11 | 11 | 15 | 13 | 30 | 25 | 31 |
| Socioeconomic and behavioral characteristics | |||||||
| Smoking (%) | 0.1 | 0.1 | 0.4 | 0.4 | 0.2 | 0.6 | 11.5 |
| Not married (%) | 1.7 | 9.1 | 2.6 | 2.1 | 12 | 14 | 65 |
| Maternal education | |||||||
| College degree (%) | 81 | 65 | 84 | 80 | 41 | 71 | 21 |
| College credit (%) | 6 | 7 | 9 | 10 | 15 | 19 | 21 |
| High school (%) | 13 | 28 | 7 | 9 | 44 | 11 | 58 |
| Medicaid user (%) | 17 | 33 | 21 | 6 | 37 | 18 | 58 |
| Month of initiation of prenatal care | |||||||
| 1–3 months (%) | 81 | 80 | 81 | 84 | 77 | 82 | 65 |
| 4–6 months (%) | 15 | 16 | 14 | 12 | 20 | 15 | 26 |
| 7–9 months (%) | 3.7 | 3.7 | 4.5 | 3.1 | 2.9 | 2.8 | 6.8 |
| None (%) | 0.8 | 0.4 | 0.6 | 0.2 | 0.9 | 0.6 | 2.8 |
| Obstetric characteristics | |||||||
| Birthweight (g) [mean] | 3143 | 3250 | 3272 | 3093 | 3161 | 3129 | 3246 |
| Male infant (%) | 52 | 52 | 52 | 51 | 52 | 52 | 51 |
| Preterm delivery (%) | 8 | 6 | 5 | 6 | 9 | 11 | 12 |
| Gestational weight gain (kg) [mean] | 12.9 | 13.7 | 13.2 | 11.2 | 13.1 | 13.3 | 13.3 |
Analysis of Singleton Births in the United States, 2009–2012. BMI: body mass index.