TABLE 2.
Percentage of nonsmokers with serum cotinine levels 0.05–10 ng/mL, by age group and race/ethnicity* — National Health and Nutrition Examination Survey, United States, 1999–2012
| Characteristic | 1999–2000 | 2003–2004 | 2007–2008 | 2011–2012 | Relative % decline† (1999–2000 to 2011–2012) | ||||
|---|---|---|---|---|---|---|---|---|---|
|
|
|
|
|
||||||
| % | (95% CI) | % | (95% CI) | % | (95% CI) | % | (95% CI) | ||
| Aged 3–11 yrs | |||||||||
| White, non-Hispanic | 63.3 | (48.7–78.0) | 68.9 | (56.8–81.0) | 58.8 | (47.9–69.6) | 37.2 | (30.0–44.4) | 41.2 |
| Black, non-Hispanic | 84.7 | (79.2–90.3) | 80.7 | (70.2–91.2) | 64.9 | (53.0–76.7) | 67.9 | (57.1–78.6) | 19.8 |
| Mexican American | 49.0 | (39.1–58.9) | 38.7 | (28.9–48.6) | 29.7 | (20.2–39.1) | 29.9 | (20.4–39.4) | 39.0 |
| Aged 12–19 yrs | |||||||||
| White, non-Hispanic | 61.8 | (52.6–71.1) | 56.9 | (48.0–65.8) | 47.9 | (33.9–61.8) | 35.8 | (28.6–43.0) | 42.1 |
| Black, non-Hispanic | 80.4 | (76.0–84.7) | 74.0 | (67.7–80.4) | 60.2 | (51.6–68.8) | 54.6 | (43.0–66.2) | 32.1 |
| Mexican American | 48.3 | (40.8–55.8) | 35.1 | (26.6–43.6) | 29.1 | (18.3–39.9) | 16.9 | (7.0–26.9) | 65.0 |
| Aged ≥20 yrs | |||||||||
| White, non-Hispanic | 45.7 | (39.3–52.0) | 40.7 | (31.6–49.8) | 36.3 | (29.3–43.3) | 17.9 | (13.8–21.9) | 60.8 |
| Black, non-Hispanic | 68.2 | (62.5–73.8) | 61.7 | (52.9–70.5) | 52.2 | (46.6–57.9) | 39.6 | (32.6–46.6) | 41.9 |
| Mexican American | 41.2 | (34.0–48.4) | 31.9 | (22.6–41.1) | 28.0 | (23.2–32.7) | 23.8 | (16.2–31.4) | 42.2 |
Abbreviation: CI = confidence interval.
*
Because of the sample design, analyses of data by race/ethnicity were limited to the three racial/ethnic populations available across all survey cycles (non-Hispanic whites, non-Hispanic blacks, and Mexican Americans).
†
All declines statistically significant at p<0.05.