Fig. 1
From: Sex-specific associations of kynurenic acid with neopterin in Alzheimer’s disease
Distribution of z-scored CSF neopterin, tryptophan, kynurenines and KTR- and KA/QA ratios for men and women in the CU and AD groups. The split violin plots show the distribution, inserted box plots show the median (middle line), 1st quartile (lower box limit) and 3rd quartile (upper box limit). Abbreviations: AD: Alzheimer’s disease; KA/QA: kynurenic acid/quinolinic acid ratio; KTR: kynurenine/tryptophan ratio; CSF: cerebrospinal fluid; CU: cognitively unimpaired