No significant publication bias was identified using funnel plots (eFigure 9, a, c, and d) or the Egger test for any other GFAP meta-analysis (AD continuum vs CU p = 0.1835, MCI-AD vs CU p = 0.9817, AD dementia vs MCI-AD p = 0.4335). Here, GFAP is linked to Alzheimer disease.