Table 1.
Demographic and Socioeconomic Characteristics of the Measured and Parent-Reported Components of the Children of the National Longitudinal Survey of Youth 1979 Cohort, United States, 1996–2008a
| Characteristic | Measured Weight and Height |
Measured Weight and Reported Height |
Reported Weight and Measured Height |
Reported Weight and Height |
Subsample, 2006 and 2008b |
Total |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | % | 95% CI | Mean | % | 95% CI | Mean | % | 95% CI | Mean | % | 95% CI | Mean | % | 95% CI | Mean | % | 95% CI | |
| Female | 48.8 | 47.1, 50.6 | 48.7 | 44.3, 53.2 | 52.6 | 49.4, 55.8 | 47.1 | 44.9, 49.4 | 48.9 | 44.9, 52.8 | 48.7 | 47.2, 50.3 | ||||||
| Mother's age at child's birth, years | 29.7 | 29.6, 29.9 | 29.1 | 28.6, 29.5 | 30.6 | 30.3, 30.9 | 30.0 | 29.8, 30.2 | 34.3 | 34.1, 34.6 | 29.8 | 29.7, 30.0 | ||||||
| Race/ethnicity of the mother | ||||||||||||||||||
| Non-Hispanic white | 77.0 | 75.1, 78.9 | 79.3 | 76.2, 82.1 | 80.6 | 78.0, 83.1 | 78.7 | 76.7, 80.6 | 80.2 | 76.7, 83.2 | 77.9 | 76.2, 79.4 | ||||||
| Hispanic | 7.4 | 6.5, 8.4 | 7.2 | 5.8, 9.0 | 8.1 | 6.8, 9.7 | 7.8 | 6.8, 9.0 | 5.7 | 4.3, 7.4 | 7.6 | 6.8, 8.4 | ||||||
| Non-Hispanic black | 14.1 | 12.7, 15.6 | 12.6 | 10.6, 15.0 | 9.1 | 7.5, 11.2 | 11.2 | 10.0, 12.6 | 13.2 | 10.9, 15.9 | 12.9 | 11.8, 14.1 | ||||||
| Other | 1.5 | 0.9, 2.3 | 0.8 | 0.3, 2.0 | 2.1 | 1.3, 3.4 | 2.3 | 1.5, 3.5 | 1.7 | 1.2, 2.4 | ||||||||
| Family incomec | ||||||||||||||||||
| <$25,000 | 21.4 | 19.6, 23.2 | 23.7 | 19.8, 28.0 | 18.9 | 16.0, 22.1 | 19.2 | 17.2, 21.4 | 14.1 | 11.3, 17.5 | 20.8 | 19.2, 22.4 | ||||||
| $25,000– $49,999 | 25.5 | 23.6, 27.4 | 22.3 | 18.5, 26.7 | 22.4 | 19.3, 25.8 | 22.0 | 19.9, 24.4 | 20.7 | 17.0, 24.9 | 24.3 | 22.7, 25.9 | ||||||
| $50,000– $74,999 | 23.2 | 21.5, 25.0 | 22.8 | 18.8, 27.3 | 25.9 | 22.7, 29.4 | 25.0 | 22.6, 27.6 | 22.2 | 18.3, 26.8 | 23.8 | 22.3, 25.4 | ||||||
| ≥$75,000 | 29.9 | 27.6, 32.4 | 31.3 | 26.4, 36.6 | 32.9 | 29.1, 36.8 | 33.8 | 30.9, 36.8 | 43.0 | 37.7, 48.4 | 31.2 | 29.1, 33.3 | ||||||
| Total | 69,200 | 65,128, 73,273 | 72,730 | 55,040, 90,420 | 76,214 | 67,514, 84,914 | 76,094 | 69,925, 82,264 | 90,269 | 78,789, 101,749 | 71,604 | 67,619, 75,590 | ||||||
| Year | 2000.2 | 2000.0, 2000.3 | 2000.2 | 1999.9, 2000.6 | 2000.2 | 1999.9, 2000.5 | 2000.2 | 2000.0, 2000.3 | 2006.7 | 2006.7, 2006.8 | 2000.2 | 2000.1, 2000.3 | ||||||
| Observations | ||||||||||||||||||
| Weighted % of NLSY79- Child total | 62.3 | 61.0, 63.5 | 4.6 | 4.2, 5.0 | 8.7 | 8.1, 9.3 | 24.4 | 23.4, 25.5 | 100.0 | |||||||||
| Unweighted person-years | 11,800 | 830 | 1,562 | 4,443 | 1,102 | 18,635 | ||||||||||||
Abbreviations: CI, confidence interval; NLSY79-Child, Children of the National Longitudinal Survey of Youth 1979 Cohort.
a Means and percentages were weighted by using sample weights; confidence interval estimates were adjusted for clustering of children in families.
b The subsample comprised children with mother-reported and measured heights and weights in the 2006 and/or 2008 survey waves.
c Family income was adjusted to year-2000 US dollars, and analyses excluded observations with item nonresponse on income (2,881 person-years).