Table 1.
Serum cotinine geometric means (95% confidence interval) for nonsmokers in United States populations 2001-2006
| Geometric means of serum cotinine (ng/mL) | NHANES 2001-2002 |
NHANES 2003-2004 |
NHANES 2005-2006 |
P value |
|---|---|---|---|---|
| Overall | 0.06 (0.05, 0.07) |
0.07 (0.06, 0.09) |
0.05 (0.05, 0.06) |
0.12 |
| Overall - Undetected | 0.018 (0.016, 0.020) |
0.018 (0.017, 0.020) |
0.019 (0.018, 0.020) |
0.75 |
| Age: (years) | ||||
| 4-11 | 0.11 (0.07, 0.15) |
0.14 (0.07, 0.20) |
0.08 (0.06, 0.10) |
0.05 |
| 4-11 - Undetected | 0.018 (0.015, 0.020) |
0.018 (0.017, 0.020) |
0.018 (0.018, 0.020) |
0.84 |
| 12-19 | 0.09 (0.05, 0.12) |
0.11 (0.08, 0.14) |
0.08 (0.06, 0.10) |
0.08 |
| 12-19 - Undetected | 0.018 (0.016, 0.020) |
0.018 (0.017, 0.020) |
0.19 (0.018, 0.021) |
0.59 |
| 20+ | 0.05 (0.04, 0.06) |
0.06 (0.04, 0.07) |
0.05 (0.04, 0.05) |
0.29 |
| 20+ - Undetected | 0.018 (0.016, 0.020) |
0.018 (0.017, 0.020) |
0.19 (0.018, 0.020) |
0.79 |
| Gender | ||||
| Male | 0.07 (0.05, 0.09) |
0.09 (0.07, 0.10) |
0.07 (0.06, 0.07) |
0.08 |
| Male - Undetected | 0.019 (0.016, 0.021) |
0.020 (0.019, 0.021) |
0.020 (0.019, 0.021) |
0.51 |
| Female | 0.05 (0.04, 0.06) |
0.06 (0.05, 0.07) |
0.05 (0.04, 0.06) |
0.22 |
| Female - Undetected | 0.018 (0.016, 0.019) |
0.017 (0.016, 0.019) |
0.018 (0.017, 0.019) |
0.88 |
| Race/ethnicity: | ||||
| Non-Hispanic White | 0.05 (0.04, 0.06) |
0.07 (0.05, 0.08) |
0.05 (0.04, 0.06) |
0.14 |
| Non-Hispanic White - Undetected | 0.018 (0.016, 0.020) |
0.018 (0.017, 0.019) |
0.19 (0.018, 0.020) |
0.66 |
| Non-Hispanic Black | 0.16 (0.13, 0.19) |
0.14 (0.10, 0.19) |
0.11 (0.09, 0.15) |
0.11 |
| Non-Hispanic Black - Undetected | 0.23 (0.020, 0.030) |
0.22 (0.020, 0.024) |
0.22 (0.021, 0.024) |
0.88 |
| Mexican American | 0.06 (0.04, 0.08) |
0.05 (0.04, 0.07) |
0.05 (0.04, 0.06) |
0.40 |
| Mexican American - Undetected | 0.18 (0.017, 0.020) |
0.18 (0.016, 0.020) |
0.17 0.016, 0.019) |
0.55 |