Figure 1.
Flow diagram of the study selection process.
ApoE, apolipoprotein E.
Table 1.
Characteristics of the included studies for the meta-analysis.
Table 2.
ApoE levels in AD and healthy controls, stratified according to the APOE genotypes.
Table 3.
Quality of reporting on ApoE assay in 8 included studies.
Figure 2.
Forest plots for ApoE levels in AD and healthy controls in included studies.
AD, Alzheimer’s disease; SD, standard deviation; CI, confidence interval.
Figure 3.
Forest plots for ApoE levels in AD and healthy controls controlling for fasting.
AD, Alzheimer’s disease; SD, standard deviation; CI, confidence interval.
Table 4.
Stratified analysis of ApoE levels by study characteristics.
Figure 4.
Funnel plots for ApoE levels in AD and healthy controls in included studies.
Vertical dashed lines represent the summary weighted mean difference (WMD).
Figure 5.
Forest plots for ApoE levels in ε3/ε3 and ε3/ε4 carriers.
(a) Forest plots for ApoE levels in ε3/ε3 carriers. (b) Forest plots for ApoE levels in ε3/ε4 carriers. AD, Alzheimer’s disease; SD, standard deviation; CI, confidence interval.