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Classification of participants with and without depressive symptoms and estimating their PHQ-9 scores using phone usage features individually and aggregated.
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Classification (PHQ9<5 vs PHQ9≥5) | PHQ9 score estimation | ||
| Training features | % mean accuracy (SD) | % mean sensitivity | % mean specificity | Mean NRMSD (SD) |
| Usage duration | 74.2 (3.4) | 64.0 | 83.9 | 0.268 (0.018) |
| Usage frequency | 68.6 (4.1) | 56.4 | 79.6 | 0.249 (0.013) |
| All | 65.7 (4.9) | 55.7 | 74.9 | 0.273 (0.019) |
