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Partial regression plots showing the relationships between PIB index and aHV (A) and EM (B) within the BAC NC group. Residuals are plotted for each variable to adjust for the effects of age; gender and education. Both regression models are significant (A: ΔR2 = 0.45; P = 0.0016; B: ΔR2 = 0.35; P = 0.0086).
