Figure 2. Forest plot for random-effects meta-analysis on difference in blood Aβ1-40 (A) and Aβ1-42 (B) concentrations between DS patients and HC subjects; blood Aβ1-40 (C) and Aβ1-42 (D) concentrations between DSD and DS patients. DS, Down syndrome. DSD, Down syndrome with dementia. HC, healthy control. CI, confidence interval.