Feature Engineering
The original features collected are listed in For the feature selection, 2 demographic features (sex and age) were directly included to account for the physical differences between the individuals. Most wearable device features were directly included in the model, except for 3. “Sleep duration” parameters were transformed into the ratio of wakefulness to sleep. “Stress” parameters were excluded owing to there being no clear definition of their value. “Resting heart rate” data were excluded considering the similarity of “resting heart rate” to “minimal heart rate” and a lack of a clear definition of “resting.” As for clinical assessment features, we used the 