Fig. 2
From: Effects of time of the day at sampling on CSF and plasma levels of Alzheimer’ disease biomarkers

Plasma biomarkers levels in samples collected in the morning and evening. Subject specific biomarker concentration in samples collected in the morning vs. evening. Average percent changes between time points are shown in box-plots plotted with the Tukey method. Blue and orange dots represent participants with negative and positive amyloid status, respectively. Asterisks represent p-values for the main effects of sampling time from repeated measures two-way ANOVA; ** p < 0.01