Fig. 2.

Classification accuracy and variable selection. A) Average subject-wise nested cross-validation classification accuracy in both healthy controls (HC) and participants with unipolar depression (UD). B) Variable selection frequency (percent of models where a given parcel was retained) in the true data (light blue) and permutations (green). The n = 90 parcels which were retained at least once are shown. IQ, the only demographic variable selected, is labeled. Solid black lines represent the median of the variable selection frequency for all n = 350 variables +/- 3.5 × the interquartile range (IQR). See Supplemental Table 2 for the full list of variable selection frequencies. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)