Table 1.
Demographic characteristics of Caucasian and African American participants with NMR (N=1672)
| Characteristic | Value |
|---|---|
| % Female, N=756 | 45.2 |
| Mean age (SD), N=1672 | 45.9 (11.0) |
| % Caucasian, N=1089 | 65.1 |
| % African American, N=583 | 34.9 |
| Mean BMI (SD), N=1672 | 29.5 (6.5) |
| Mean # drinks/week (SD), N=1672 | 3.3 (5.2) |
| Mean cigarettes per day (SD), N=1672 | 18.7 (7.5) |
| Mean breath CO, ppm (SD), N=1672 | 23.3 (10.2) |
| NMR in total group, N=1672 | |
| Mean (SD) | 0.38 (0.21) |
| Median | 0.35 |
| Range | 0.01–1.90 |
| Skewness | 1.51 |
| Kurtosis | 4.87 |
| NMR in ITT group, N=1155a | |
| Mean (SD) | 0.35 (0.20) |
| Median | 0.30 |
| Range | 0.01 – 1.31 |
| Skewness | 1.39 |
| Kurtosis | 2.63 |
a
Participants with lower NMR were oversampled in the clinical trial, reflecting the lower NMR values observed in the ITT group vs. in the total group
Abbreviations: BMI, body mass index; CO, carbon monoxide; ppm, parts per million; NMR, nicotine metabolite ratio