Again, we found that higher transcription of CCL24 significantly differentiated MDD patients from controls in our discovery cohort (t = 7.237, d.f. = 57, p≤0.000001, d = 1.917) and validation cohort (t = 6.603, d.f. = 23, p≤0.000001, d = 2.754) when MDD blood was collected from a different time point. This evidence concerns the gene CCL24 and major depressive disorder.