Table 1.
Demographic Comparisons Between the Analytic Samples and a Nationally Representative Sample of Kindergarten Children (ECLS-K, 1998)
| Variable | NICHD SECCYD |
ECLS-K, 1998 | |
|---|---|---|---|
| Children of nondegreed mothers | Children of degreed mothers | Nationally representative sample | |
| Proportion male | .49 | .46 | .51 |
| Proportion Black | .16 | .02 | .16 |
| Proportion Hispanic | .07 | .03 | .19 |
| Proportion White | .73 | .91 | .57 |
| Mean age of mother (in years) at child’s birth | 26.84 (5.61) | 31.67 (4.01) | 27.28 (6.61) |
| Mother’s education (proportions) | |||
| Did not complete high school | .14 | .00 | .14 |
| Graduated from high school | .32 | .00 | .29 |
| Some college | .54 | .00 | .33 |
| Bachelor’s degree or higher | .00 | 1.00 | .23 |
| Income-to-needs ratio | |||
| ≤ 1 | 0.18 | 0 | 0.17 |
| > 1 to ≤ 2 | 0.27 | 0.05 | 0.26 |
| > 2 to ≤ 3 | 0.25 | 0.19 | 0.16 |
| > 3 to ≤ 4 | 0.15 | 0.21 | 0.16 |
| > 4 | 0.15 | 0.55 | 0.24 |
| Proportion of mothers unemployed | .29 | .23 | .32 |
| Mean number of children in home | 2.32 (1.03) | 2.16 (0.83) | 2.49 (1.16) |
| Proportion of mothers married | .67 | .93 | .70 |
| Number of observations | 552 | 366 | 21,242 |
Note: Standard deviations are given in parentheses. The Early Childhood Longitudinal Survey—Kindergarten (ECLS-K) estimates were derived from data made publically available by the National Center for Education Statistics (https://nces.ed.gov/ecls/dataproducts.asp). All ECLS-K measures shown were collected during the fall of kindergarten (i.e., 1998), and National Institute of Child Health and Human Development (NICHD) Study of Early Child Care and Youth Development (SECCYD) measures were collected during the 54-month interview (i.e., preschool; 1995–1996), except for mother’s education and mother’s age at child’s birth, which were both collected at the 1-month interview. The ECLS-K variables were weighted using the C1CW0 weight to generate nationally representative estimates.