| T0 (baseline) | Tmid (4 weeks) | T1 (3 months) | T2 (6 months) | T3 (9 months) | T4 (12 months) | T5 (15 months) | |
---|---|---|---|---|---|---|---|---|
Primary outcome | ||||||||
 IDS-C | Depressive symptoms | x |  | x | x | x | x | x |
Secondary outcomes | ||||||||
 YMRS | (Hypo)manic symptoms | x |  | x | x | x | x | x |
 SCID-I | Relapse | x |  | x | x | x | x | x |
 ASRM | (Hypo)manic symptoms |  | x |  |  |  |  |  |
 QIDS-SR | Depressive symptoms |  | x |  |  |  |  |  |
 STAI | Anxiety symptoms | x |  | x | x | x | x | x |
 FAST | Overall functioning | x |  | x | x | x | x | x |
 MHC-SF | Positive mental health | x | x | x | x | x | x | x |
 FFMQ | Mindfulness | x | x | x | x | x | x | x |
 SCS-SF | Self-compassion | x | x | x | x | x | x | x |
 RPA-NL | Responses to positive affect | x | x | x | x | x | x | x |
 RRS-EXT | Brooding | x | x | x | x | x | x | x |
Cost-effectiveness | ||||||||
 EQ-5D-5L | Quality of life and quality adjusted life years | x |  | x | x | x | x | x |
 TiC-P | Costs associated with illness | x |  | x | x | x | x | x |