Table 5. Bivariate Rank Correlations^a of biological measures with BDI-II scores by types of antidepressants (N = 67).

	No medication	SSRI	SRNI	Other antidepressants
	n = 12 BDI-II	n = 26 BDI-II	n = 22 BDI-II	n = 8 BDI-II
TRP	−.036	−.421*	−.433*	.431
KYN	−.164	−.446*	.090	−.275
KYN/TRP Ratio	−.191	−.017	.383	−.515
QA	.077	−.212	.270	−.072
KA	−.473	−.141	−.241	−.587

Notes.

^aSpearman’s Rho.

^*p < 0.05.

^**p < 0.01.

^***p < 0.001.