Table 1.
Overview of questionnaires
| Time of measurement | |||||
| Self rated questionnaires | Aim |
T0 Baseline (pre-test) |
T1 Post-test |
T2 Follow-up (3 months) |
T3 Follow-up (12 months) |
| CES-D | Symptoms of depression | X | X | X | X |
| PHQ-9 | Symptoms of depression | X | X | X | X |
| HADS | Symptoms of anxiety | X | X | X | X |
| BAI | Symptoms of anxiety | X | X | X | X |
| EuroQol | Quality of life | X | X | X | X |
| TIC-P | Health service uptake and production losses | X | - | X | X |
| Mastery scale | Mastery | X | X | X | X |
| CSQ-8 (condition 1–4) |
Client satisfaction with treatment | - | X | - | - |
| WAI (condition 2–4) |
Client satisfaction with coach | - | X | - | - |
| CEQ | Expectancy and treatment credibility | X | - | - | - |
| SQ | Motivation | X | |||
| SAPAS | Personality disorder | X | - | - | - |
| WSQ | Common mental disorders | X | - | - | - |
| SPSI-R | Problem solving skills | X | X | X | X |
| Internet-Intervention Adherence Survey | Non-response, attrition | - | i.a. | i.a. | i.a. |
| Various | User characteristics | X | - | - | - |
*i.a.: if applicable