Table 1. . Demographic characteristics of Center for the Health Assessment of Mothers and Children of Salinas mothers and children (1999–2000).
| Characteristic | CHAMACOS mothers and their children with imprinted gene DMR methylation data (n = 296) n (%) |
|---|---|
| Child sex: | |
| – Boy | 148 (50.0) |
| – Girl | 148 (50.0) |
| Child gestational age at birth: | |
| – 34–36 weeks | 20 (6.8) |
| – ≥37 weeks | 276 (93.2) |
| Child birth weight: | |
| – Low birth weight (<2500 g) | 10 (3.4) |
| – Normal birth weight (≥2500 g) | 286 (96.6) |
| Maternal age at pregnancy: | |
| – 18–24 | 137 (46.3) |
| – 25–29 | 101 (34.1) |
| – 30–34 | 46 (15.5) |
| – 35–45 | 12 (4.1) |
| Number of years mother lived in USA at pregnancy: | |
| – Less than 1 year | 55 (18.6) |
| – 1–5 years | 102 (34.5) |
| – 6–10 years | 70 (23.6) |
| – 11 or more years | 69 (23.3) |
| Maternal prepregnancy BMI:† | |
| – Underweight (<18.5 kg/m2) | 2 (0.7) |
| – Normal (18.5–24.9 kg/m2) | 118 (40.7) |
| – Overweight (25–29.9 kg/m2) | 115 (39.7) |
| – Obese (≥30 kg/m2) | 55 (19.0) |
| Parity: | |
| – 0 | 106 (35.8) |
| – ≥1 | 190 (64.2) |
| Education: | |
| – ≤6th grade | 125 (42.2) |
| – 7–12th grade | 114 (38.5) |
| – ≥High school graduate | 57 (19.3) |
| Poverty status: | |
| – ≤Poverty level | 184 (62.2) |
| – Poverty level | 112 (37.8) |
†Total number of observations for maternal prepregnancy BMI varies due to missing data.
BMI: Body mass index; CHAMACOS: Center for the Health Assessment of Mothers and Children of Salinas; DMR: Differentially methylated region.