In addition, YKL-40 and sCD14 were very stable in AD patients with strong correlation between time-points (r = 0.94, p = 3.4 × 10−25; r = 0.77, p = 2.0 × 10−11) and the cortical damage marker T-tau (Olsson et al., 2013). Here, CHI3L1 is linked to Alzheimer disease.