Table 1.
Cigarette Use and Urinary Biomarker Levels
| Mean (SD) | Median | Range | N | |
|---|---|---|---|---|
| Cigarettes per day on days smoked | 3.26 (2.15) | 3.0 | 1–11 | 56 |
| Total cigarettes/8 days | 17.07 (13.83) | 13.0 | 1–52 | 57 |
| Days smoked/30 days | 12.96 (5.41) | 15.0 | 1–24 | 57 |
| Urinary creatinine, mg/ml | 1.19 (0.71) | 1.0 | 0.14–3.15 | 57 |
| Normalized urinary nicotine, ng/mg creatine | 914.93 (2137.08) | 240.46 | 2.7–15062 | 56 |
| Normalized urinary NNAL, pg/mg creatine | 268.13 (422.83) | 140.74 | 0.77–2305.68 | 57 |
| Normalized urinary cotinine, ng/mg creatine | 804.40 (917.76) | 490.85 | 3.21–3743 | 56 |
Note. NNAL = 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol. Urinary nicotine, NNAL, and cotinine were creatinine normalized. Ns ranged from 56 to 57 due to missing values.