Figure 3. Performance of models for predicting depressive symptoms at 3 months follow-up, as measured by (a) R2: R squared, (b) RMSE: root mean squared error, and (c) MAE: mean absolute error.

Results are summarized over 30 repetitions. Univariate: model with respective baseline depression measures as the sole predictor, Raw: all normalized baseline variables as predictors, Residuals: residualized baseline variables as predictors, PC5: first 5 principal component scores, PC10: first 10 principal component scores, PC20: first 20 principal component scores.