Table 5.
Correlation of emission flux of VOCs with the levels of estradiol (E2) in the blood.
| VOC | Functional group | Correlation coefficient (r) | p-value*1 | |
|---|---|---|---|---|
| Cubital fossa | ||||
| Ethyl mercaptan | Sulfur compounds | 0.439 | 0.002 | |
| Propanal | Aldehyde | −0.347 | 0.016 | |
| 1-hexanol | Alcohol | −0.330 | 0.022 | |
| 2-decanone | Alcohol | −0.322 | 0.026 | |
| 3-hydroxy-3-methylhexanoic acid | Fatty acid | −0.316 | 0.029 | |
| 7-octenoic acid | Fatty acid | 0.310 | 0.032 | |
| 1-octanol | Alcohol | −0.307 | 0.034 | |
| γ-decanolactone | Lactone | 0.301 | 0.038 | |
| 3-methyl 2-hexenoic acid | Fatty acid | −0.296 | 0.041 | |
| Butyric acid | Fatty acid | 0.285 | 0.049 | |
| Octanoic acid | Fatty acid | −0.283 | 0.051 | |
| Isovaleraldehyde | Aldehyde | −0.272 | 0.062 | |
| 2-nonanone | Ketone | 0.247 | 0.090 | |
| Valeric acid | Fatty acid | −0.246 | 0.091 | |
| 2-ethyl-1-hexanol | Alcohol | −0.246 | 0.092 | |
| Butanal | Aldehyde | 0.245 | 0.093 | |
| 2-tetradecanone | Ketone | −0.241 | 0.099 | |
| Armpit | ||||
| 7-octenoic acid | Fatty acid | 0.510 | 0.000 | |
| Ethyl mercaptan | Sulfur compounds | 0.340 | 0.018 | |
| Propionic acid | Fatty acid | 0.333 | 0.021 | |
| 2-dodecanone | Ketone | 0.321 | 0.026 | |
| Octanal | Aldehyde | −0.300 | 0.038 | |
| Heptanol | Alcohol | 0.297 | 0.041 | |
| Isovaleraldehyde | Aldehyde | −0.284 | 0.050 | |
| Propanal | Aldehyde | −0.275 | 0.058 | |
| 2-decanone | Ketone | −0.266 | 0.068 | |
| Valeric acid | Fatty acid | 0.265 | 0.069 | |
| Pentanol | Alcohol | −0.254 | 0.082 | |
| Hexanal | Aldehyde | −0.244 | 0.094 | |
VOC: volatile organic compound.
*1: p-values were calculated using Spearman's rank correlation test.