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Depression symptom features.
| DSM symptom | Symptom features |
|---|---|
| sleep changes | sleep duration sleep start sleep end |
| diminished ability to concentrate | unlock duration unlock duration at dorm unlock duration at study places |
| diminished interest or pleasure in activities | stationary time conversation duration number of places visited time at dorm time at study places |
| depressed mood and fatigue or loss of energy | heart rate |
