Table 1

Sociodemographic characteristics of the samples by grade level (entries are percentages, and SEs are in parentheses)

Variable12th grade*10th grade†8th grade‡
Female52.09 (1.13)49.38 (0.93)51.40 (0.75)
Non-Hispanic White52.88 (3.21)56.60 (2.90)45.78 (3.12)
Hispanic16.73 (2.66)15.86 (2.07)23.66 (2.66)
Non-Hispanic African-American15.13 (2.27)10.05 (1.57)14.24 (1.83)
At least one parent with college degree52.95 (2.33)60.85 (2.37)56.39 (2.07)
  • Percentages for race/ethnicity do not add to 100% because smaller groups are not presented.

  • *n=4090 to 4275 (unweighted).

  • †n=4898 to 5219 (unweighted).

  • ‡n=4780 to 4801, with exception n=4251 for parental education (unweighted).