Fig. 5From: The plasma kynurenine-to-tryptophan ratio as a biomarker of tuberculosis disease in people living with HIV on antiretroviral therapy: an exploratory nested case–control studyPlasma K/T ratios showed a quadratic association with CD4 cell counts in participants with TB disease, but not in controls. Body mass index showed no correlation with K/T ratio in either groupBack to article page