Fig. 2
Mean differences (unadjusted and adjusted) in neuroimaging features by different quartiles of IGF-1 concentrations compared to the lowest group. Adjusted estimates were controlled for sex, age (timescale), ethnicity, educational attainment, Townsend deprivation index, smoking status, alcohol intake frequency, vegetable and fruit intake, body mass index, hypertension, diabetes, total cholesterol, and C-reactive protein