Table 2 Correlations between ethyl carbamate and STP constituents
| Â | Pearson correlation coefficient, R, and p value | |
|---|---|---|
All values included | Values < LOD excluded | |
All brands | ||
 Karl Fisher water | 0.285 (0.013) | 0.223 (0.236) |
All brands except US snus | ||
 Karl Fisher water | 0.274 (0.022) | 0.223 (0.236) |
 Water activity | 0.167 (0.167) | − 0.058 (0.762) |
 pH | 0.125 (0.301) | − 0.222 (0.237) |
 Total nicotine alkaloids | 0.087 (0.475) | 0.270 (0.149) |
 Nicotine | 0.131 (0.278) | 0.219 (0.245) |
 Reducing sugars | − 0.167 (0.167) | − 0.188 (0.319) |
 Total sugars | − 0.176 (0.146) | − 0.189 (0.317) |
 Nitrate | 0.029 (0.821) | 0.641 (0.000) |
 Propylene glycol | − 0.169 (0.182) | − 0.621 (0.001) |
 Glycerol | − 0.341 (0.006) | − 0.329 (0.101) |
 Ammonia nitrogen | 0.455 (0.000) | 0.701 (0.000) |
 Chloride ion | 0.368 (0.002) | 0.348 (0.060) |
 Sodium ion | 0.365 (0.002) | 0.423 (0.020) |