Percentage of Middle and High School Nonsmokers Who Reported Riding in a Car With Someone Who Was Smoking During the Past 7 Days, by Year, School Level, Gender, and Race/Ethnicity—NYTS, United States, 2000–2009

n = 27 214n = 20 552n = 22 783n = 22 585n = 18 854
%(95% CI)b%(95% CI)%(95% CI)%(95% CI)%(95% CI)% Change(95% CI)
Overall39.0(37.0–41.0)38.5(36.5–40.5)30.7(29.0–32.6)28.6(26.7–30.6)22.8(21.0–24.8)−71.1c(−65.4 to −76.8)
School level
 Middle (grades 6–8)38.7(36.4–41.1)38.0(35.5–40.6)29.6(27.3–31.9)27.5(24.9–30.2)21.7(19.2–24.5)−78.3c(−70.8 to −85.8)
 High (grades 9–12)39.2(36.9–41.5)38.9(36.5–41.3)31.9(29.8–34.2)29.6(27.3–32.1)23.8(21.5–26.2)−64.7c(−57.9 to −71.5)
 Girl40.9(38.7–43.2)40.6(38.4–42.8)32.8(30.6–35.0)30.9(28.6–33.3)25.4(23.4–27.6)−61.0c(−54.9 to −67.1)
 Boy37.0(34.9–39.0)36.3(34.2–38.5)28.7(26.9–30.5)26.0(24.2–28.0)20.2(18.2–22.3)−83.2c(−77.0 to −89.4)
 White, non-Hispanic40.1(37.6–42.6)40.4(37.7–43.1)33.3(30.9–35.8)31.0(28.4–33.7)24.8(22.7–26.9)−61.7c(−55.3 to −68.1)
 Black, non-Hispanic41.0(38.5–43.7)39.3(36.7–41.9)28.2(26.1–30.4)26.4(24.2–28.8)20.7(17.1–24.9)−98.1c(−88.3 to −107.9)
 Hispanic33.2(30.0–36.6)32.0(29.6–34.5)25.8(23.4–28.3)23.4(21.2–25.8)20.1(17.1–23.4)−65.2c(−54.0 to −76.4)
 Asian, non-Hispanic26.7(23.1–30.7)24.8(21.3–28.7)14.8(12.2–17.9)15.1(12.4–18.1)14.1(10.6–18.4)−89.4c(−73.4 to −105.4)
 AI/AN,d non-Hispanic40.7(32.7–49.3)42.0(34.7–49.6)29.4(23.0–36.7)30.0(23.9–36.8)32.5(23.5–43.0)−25.2c(+3.6 to −54.0)
 NH/PI,e non-Hispanic39.2(31.7–47.3)37.9(29.0–47.7)32.1(23.2–42.4)29.8(23.5–37.0)29.6(20.2–41.1)−32.4c(−2.0 to −62.8)
  • All data presented are weighted to adjust for differential nonresponse and selection.

  • a A “nonsmoker” was defined as any student who responded “0 days” to the question, “During the past 7 days, on how many days did you ride in a car with someone who was smoking cigarettes?”

  • b CI, confidence interval.

  • c Significant linear trend between 2000 and 2009 (binary logistic regression, P < .05); adjusted for all other covariates listed in table.

  • d American Indian or Alaska Native.

  • e Native Hawaiian or other Pacific Islander.