| MDD | Major Depressive Disorder |
| SSRI | Selective serotonin reuptake inhibitor |
| EMA | European Medicines Agency |
| ODQ | Oxford Depression Questionnaire |
| PHQ-9 | Patient Health Questionnaire-9 |
| PDQ-D | Perceived Deficits Questionnaire—Depression |
| SDS | Sheehan Disability Scale |
| MFI | Multidimensional Fatigue Inventory |
| SHAPS | Snaith–Hamilton Pleasure Scale |
| CGI | Clinical Global Impression; MI = severity scale, Change = improvement scale, Effect = efficacy index |
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