Table 2.
Correlations between carbonyl and free radical deliveries across different brands of cigarettes.
| Formaldehyde | Acetaldehyde | Propionaldehyde | Crotonaldehyde | Methyl Ethyl Ketone (MEK) | Total Carbonyls | Ventilation | |
|---|---|---|---|---|---|---|---|
| Formaldehyde | |||||||
| Acetaldehyde | 0.009 (0.64) | ||||||
| Propionaldehyde | 0.001 (0.87) | 0.953 (< 0.001) | |||||
| Crotonaldehyde | (−) 0.005 (0.72) | 0.395 (0.003) | 0.356 (0.008) | ||||
| MEK | 0.000 (0.97) | 0.909 (< 0.001) | 0.895 (< 0.001) | 0.510 (< 0.001) | |||
| Free Radicals (Gas Phase) | (−) 0.107 (0.09) | 0.416 (0.002) | 0.418 (0.002) | 0.209 (0.01) | 0.327 (0.002) | 0.370 (0.006) | (−) 0.336 (0.001) |
| Free Radicals (Particulate Phase) | 0.012 (0.50) | 0.311 (0.002) | 0.236 (0.009) | 0.054 (0.23) | 0.172 (0.03) | 0.268 (0.005) | (−) 0.313 (0.002) |
| TPM | 0.0003 (0.93) | 0.440 (< 0.001) | 0.421 (0.002) | 0.225 (0.01) | 0.401 (0.003) | 0.435 (< 0.001) | (−) 0.564 (< 0.001) |
| Ventilation | 0.009 (0.63) | (−) 0.589 (< 0.001) | (−) 0.589 (< 0.001) | (−) 0.411 (0.002) | (−) 0.526 (< 0.001) | (−) 0.600 (< 0.001) |
a
Values are r2 with negative sign added to indicate a negative correlation and corresponding p-values in parentheses.