Differences in the ratio of TRP-KYN pathway metabolites between HCs and PSOs

Ratios of metabolites HCs (mean ± SD) PSOs (mean ± SD)
KYN/TRP 0.0382 ± 0.0102 0.0369 ± 0.0121
KYNA/KYN 0.0196 ± 0.0060 0.0188 ± 0.0085
AA/KYN 0.0087 ± 0.0027 0.0092 ± 0.0048
3HK/KYN 0.0093 ± 0.0039 0.0111 ± 0.0052 *
3HAA/3HK 0.4319 ± 0.2317 0.9026 ± 0.4619 ***
3HAA/AA 0.499 ± 0.385 1.0893 ± 0.614 ***

P < 0.05; ***P < 0.001 vs. HCs