Research Article

Genetic Risk Factors for Longitudinal Changes in Structural MRI in Former Organolead Workers

Figure 2

Effect modification by APOE genotype on relation of age with change in frontal WM volume for APOE ε3/ε3 (black dots, solid regression line) and ε3/ε4 plus ε4/ε4 groups (triangles, dashed regression line). The slopes of the two lines were different (P < 0.05).
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