Table 1.
Twins and Primary Caregiver Demographics
| Demographic Items | Total Sample |
|---|---|
| Twins | N = 381 |
| Age, M years (SD) | 8.45 (0.45) |
| Sex (Female), n (%) | 189 (49.6) |
| Race/Ethnicity, n (%) | |
| Black/African American | 16 (4.2) |
| Hispanic/Latino | 96 (25.2) |
| Non-Hispanic White/European American | 215 (56.4) |
| Asian/Asian American | 20 (5.2) |
| Native American | 4 (1.0) |
| Native Hawaiian or Pacific Islander | 6 (1.6) |
| Multi-racial/ethnic or Unknown | 24 (6.3) |
| Caregiver | N = 191 |
| Relation to twins, n (%) | |
| Mother | 181 (94.8) |
| Father | 10 (5.2) |
| Relationship Status (at 12 months), n (%) | |
| Single/Never Married | 10 (5.2) |
| Married | 141 (73.8) |
| In a partnership | 12 (6.3) |
| Divorced | 3 (1.6) |
| Separated | 2 (1.0) |
| Widowed | 1 (0.5) |
| Other or Unknown | 22 (11.5) |
| Education (at 12 months), n (%) | |
| Less than a high school education | 4 (2.1) |
| High school degree | 17 (8.9) |
| Some college | 46 (24.1) |
| College degree (e.g., BS or BA) | 69 (36.1) |
| 2+ years of graduate school | 5 (2.6) |
| Graduate or professional degree | 28 (14.7) |
| Unknown | 22 (11.5) |
| Income-to-needs ratio (at 12 months), n (%) | |
| Below 1 (under poverty line) | 16 (9.8) |
| 1 – 2 (near the poverty line) | 34 (20.7) |
| 2 – 3 (lower middle class) | 40 (24.4) |
| Greater than 3 (middle to upper class) | 74 (45.1) |
| Household size (at 12 months), M (SD) | 4.85 (1.26) |
Note: percentages for income-to-needs ratios based on available data