Table 1. Correlation Coefficients and p-Values for Male and Female Participants for 18 Volatiles, TVOCs, Skin Surface pH, and TDC as Functions of Age^a.

	Correlation (coefficient r, p-value)
	Age
Variable	Male	Female
Acetic acid	-0.622, 0.002↓	-0.469, 0.002↓
Octanoic acid	–0.031, 0.895	0.146, 0.375
Nonanoic acid	0.259, 0.256	–0.237, 0.146
n-decanoic acid	0.033, 0.885	0.006, 0.969
Hexanal	0.145, 0.530	0.320, 0.046
Octanal	–0.166, 0.472	0.024, 0.888
Nonanal	0.473, 0.030↑	0.359, 0.024↑
Decanal	–0.124, 0.591	0.166, 0.313
Undecanal	–0.118, 0.611	0.290, 0.073↑
Dodecanal	0.028, 0.904	–0.031, 0.852
Benzaldehyde	–0.165, 0.475	–0.081, 0.622
6-Methyl-5-hepten-2-one	–0.094, 0.684	–0.042, 0.800
Geranylacetone	0.107, 0.645	0.074, 0.653
Benzyl alcohol	0.259, 0.256	0.279, 0.085↑
1-Dodecanol	0.307, 0.176	0.070, 0.673
2-Ethyl-1-hexanol	-0.692, 0.0005↓	-0.621, 0.00002↓
Hexadecane	–0.196, 0.393	–0.039, 0.815
Isopropyl myristate	–0.143, 0.536	0.206, 0.208
TVOCs	0.401, 0.029↑	-0.333, 0.033↓
Skin surface pH	0.440, 0.045↑	0.465, 0.002↑
TDC	0.476, 0.029↑	0.342, 0.033↑

^aVariables which show significant change (p < 0.1) with age are in bold; arrows represent up-regulation (↑) or down-regulation (↓).