TABLE 1

Sample Characteristics of the US HBSC Samples in 2001–2002, 2005–2006, and 2009–2010 (Total N = 34 605)

CategoriesHBSC 2001–2002 (N = 14 607)HBSC 2005–2006 (N = 9150)HBSC 2009–2010 (N = 10 848)
N%SE95% CIN%SE95% CIN%SE95% CI
Gendera
 Boy697748.10.5647.0–49.2443149.20.8347.6–50.8558752.00.7050.6–53.4
 Girl763051.90.5650.8–53.0471950.80.8349.2–52.4526148.00.7046.6–49.4
Race/ethnicitya,b
 White739962.92.1858.6–67.2396948.93.2342.5–55.1466250.73.3444.2–57.3
 African-American302716.51.7813.0–20.0182217.92.5312.9–22.9203616.92.0112.9–20.8
 Hispanic288312.81.2710.3–15.3233819.12.0624.1–23.2294619.82.4914.9–24.7
 Other12987.90.666.6–10.3102114.11.7310.7–17.5120412.71.2410.2–15.1
Continuous variableMeanSE95% CIMeanSE95% CIMeanSE95% CI
Agea13.90.0513.8–14.014.10.0714.0–14.313.90.0713.8–14.1
  • N = sample size; % = weighted percentage adjusting for complex survey design, including stratification, clustering, and over sampling. A total of 433 participants were excluded due to missing data on demographic information.

  • a Sample compositions differed significantly by gender, race/ethnicity, and age.

  • b The “other” group includes Asian, Hawaiian/Pacific Islander, and American Indian/Alaskan Native.