Figure 9.

Comparison of the overall mean absolute error (MAE) after evaluation of the pretrained model using photoplethymographic (PPG) data without fine tuning (blue boxes), after fine tuning (red boxes), after fine tuning with personalization using randomly drawn data (orange boxes) and after personalization using the first 20% of the test subject’s data. Statistical significant differences of the MAE pre and post fine tuning are marked with a black asterisk. Statistical significant differences in MAE among the two personalization strategies are marked with a red asterisk (checked using a Kolmogorov-Smirnov test). (a,b) show the results for SBP and DBP respectively.