TIMM8A and Anxiety: In the fourth analysis, focused on above-the-3rd quartile α-pinene concentrations, the estimated effect was −1.68 STAI-S points (95% C.I. −3.2 to −0.16, p = 0.03), indicating that the average effect of exposure to above-the-3rd quartile α-pinene air concentrations was to decrease anxiety symptoms, suggesting that α-pinene may have a major role in the anxiolytic effects of inhaled MTs.