Table 2 Spearman’s rank correlation coefficients of associations between urinary biomarkers of tobacco exposure, 8-OHdG, and m7Gua
From: Effects of smoking cessation on biological monitoring markers in urine
| Variable | Correlation coefficients | |||
|---|---|---|---|---|
| Nicotine | Cotinine | NNAL | m7Gua | |
| Cotinine | 0.80** | – | – | – |
| NNAL | 0.61** | 0.66** | – | – |
| m7Gua | 0.16 | 0.26** | 0.35** | – |
| 8-OHdG | 0.04 | −0.06 | −0.02 | 0.22* |