TREM2 and Alzheimer disease: Next, we tested whether plasma sTREM2 levels differ between clinical diagnoses, regardless of the TREM2 rare variant status, between AD (M = 8859 ng/L, SD = 5951 ng/L), MCI (M = 6204 ng/L, SD = 2572 ng/L) and controls (M = 7352 ng/L, SD = 5318 ng/L).