Table 4. Partial Correlations^a of biological measures controlling for body mass index (BMI).

	BDI-II	TRP	KYN	KYN/TRP Ratio	QA
TRP	−0.408***
KYN	−0.239*	0.276**
KYN/TRP Ratio	.037	−0.390***	0.766***
QA	−0.236*	.019	0.662***	0.624***
KA	−0.310**	0.236*	0.543***	0.391***	0.446***

Notes.

^aPartial correlations based on 102 cases.

^*p < 0.05.

^**p < 0.01.

^***p < 0.001.