|Table 1. Percentage distribution of children born in 2001, by child and family characteristics: 2005–06
|Characteristic||Number of children (thousands)||Percent of population|
|American Indian and Alaska Native, non-Hispanic||19||0.5|
|Higher order (e.g., triplet)||7||#|
|Normal birth weight (more than 5.5 pounds)||3,643||92.5|
|Moderately low birth weight (more than 3.3 to 5.5 pounds)||244||6.2|
|Very low birth weight (3.3 pounds or less)||50||1.3|
|Child's age (in months) at time of assessment|
|Less than 48 months (less than 4 years old)||645||16.4|
|48 through 57 months (4 years old to 4 years, 9 months)||2,939||74.6|
|More than 57 months (older than 4 years, 9 months)||356||9.0|
|Family type, preschool round3|
|Mother's employment status, preschool round|
|Full time (35 hours or more)||1,541||39.4|
|Part time (Less than 35 hours)||772||19.7|
|Looking for work||227||5.8|
|Not in labor force||1,344||34.3|
|No mother in household||30||0.8|
|# Rounds to zero.
1 Black, non-Hispanic includes African American. Hispanic includes Latino. Other, non-Hispanic includes Native Hawaiian/other Pacific Islanders and children of more than one race.
2 Plurality is divided into singletons (one baby), twins (two babies), and higher order births (three or more babies). Since higher order births comprise about 0.2 percent of the ECLS-B sample, estimates for higher order births are not presented in tables 3 through 7.
3 Two parent includes biological mother and biological father; biological mother and other father; biological father and other mother; and two adoptive parents. Single parent refers to biological mother only; biological father only; and single adoptive parent. Other refers to related and/or unrelated guardians.
NOTE: Estimates weighted by W3R0. Detail may not sum to totals because of rounding or missing data.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Early Childhood Longitudinal Study, Birth Cohort (ECLS-B), Longitudinal 9-Month-Preschool Restricted-Use Data File (NCES 2008-024).