Table 6.
Correlation of emission flux of VOCs with the levels of progesterone (PRG) in the blood.
| VOC | Functional group | Correlation coefficient (r) | p-value*1 | |
|---|---|---|---|---|
| Cubital fossa | ||||
| Propanal | Aldehyde | −0.452 | 0.001 | |
| 3-methyl-2-hexenoic acid | Fatty acid | −0.422 | 0.003 | |
| Octanoic acid | Fatty acid | −0.397 | 0.005 | |
| 1-pentanol | Alcohol | −0.371 | 0.009 | |
| 2-nonanone | Ketone | 0.339 | 0.018 | |
| Butyric acid | Fatty acid | 0.332 | 0.021 | |
| 1-octanol | Alcohol | −0.330 | 0.022 | |
| Hexanal | Aldehyde | −0.311 | 0.031 | |
| 2-hexenal | Aldehyde | −0.300 | 0.038 | |
| 1-hexanol | Alcohol | −0.289 | 0.047 | |
| 1-butanol | Alcohol | −0.277 | 0.057 | |
| 2-decanone | Ketone | −0.276 | 0.057 | |
| Diallyl disulfide | Sulfur compounds | 0.276 | 0.058 | |
| Heptanal | Aldehyde | −0.270 | 0.063 | |
| Ethyl mercaptan | Sulfur compounds | 0.265 | 0.069 | |
| 2-ethyl-1-hexanol | Alcohol | −0.258 | 0.076 | |
| γ-octanolactone | Lactone | 0.251 | 0.085 | |
| Armpit | ||||
| 1-heptanol | Alcohol | 0.506 | 0.000 | |
| 7-octenoic acid | Fatty acid | 0.382 | 0.007 | |
| 2-octanone | Ketone | 0.354 | 0.014 | |
| Propionic acid | Fatty acid | 0.348 | 0.016 | |
| 3-methyl-2-hexenoic acid | Fatty acid | −0.344 | 0.017 | |
| Propanal | Aldehyde | −0.308 | 0.033 | |
| Diallyl disulfide | Sulfur compounds | 0.302 | 0.037 | |
| Ethyl mercaptan | Sulfur compounds | 0.275 | 0.059 | |
| Valeric acid | Fatty acid | 0.270 | 0.063 | |
| Hexanoic acid | Fatty acid | 0.257 | 0.077 | |
| Hexanal | Aldehyde | −0.255 | 0.081 | |
| 2-decanone | Ketone | −0.246 | 0.091 | |
VOC: volatile organic compound.
*1: p-values were calculated using Spearman's rank correlation test.