Table 1.
Study quality assessment using the Psychotherapy Outcome Study Methodology Rating Scale (POMRF)
| Study | Gregg (2007) | Sheppard (2010) | Dindo (2012) | Dindo (2014)† | Welch (2014) | Dindo (2015) | Hou (2017) | Dindo (2018) | Ferreira (2018) | Huddleston (2018) | Hadland smyth (2019) | Pedersen (2019) | Dindo (2020a) | Dindo (2020b) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pilot/Feasibility | N | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | N | Y | N |
| Controlled | Y | N | Y | Y | N | Y | N | Y | N | N | Y | Y | Y | Y |
| 1: Clarity of sample description | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 |
| 2: Severity/chronicity of disorder | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| 3: Representative-ness of sample | 2 | 1 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 4: Reliability of diagnosis | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| 5: Specificity of outcome measures | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 6: Reliability and validity of outcome measures | 2 | 2 | 2 | 0 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 |
| 7: Use of blind evaluators | 1 | n/a | 0 | 0 | n/a | 0 | n/a | 1 | n/a | n/a | n/a | 0 | 0 | 2 |
| 8: Assessor training | 1 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | n/a | 0 | 0 | 0 |
| 9: Assignment to treatment | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 2 |
| 10: Design | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 2 |
| 11: Power analysis | 2 | 0 | n/a | n/a | n/a | n/a | 0 | n/a | n/a | n/a | n/a | 2 | n/a | 0 |
| 12: Assessment points | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 2 | 0 | 1 |
| 13: Manualized, replicable, specific treatment programs | 2 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 2 | 2 |
| 14: Number of therapists | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 |
| 15: Therapist training/experience | 1 | 2 | 2 | 2 | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 | 2 | 2 |
| 16: Checks for treatment adherence | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
| 17: Checks for therapist competence | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0 |
| 18: Control of concomitant treatments | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 19: Handling of attrition | 2 | 1 | 1 | 1 | 0 | 1 | 0 | 2 | 1 | 0 | 0 | 2 | 1 | 1 |
| 20: Statistical analyses and presentation of results | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 1 | 2 | 2 | 2 | 1 | 2 | 2 |
| 21: Clinical significance | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| 22: Equality of therapy hours | 2 | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | 0 | n/a | 2 |
Note. Pilot/feasibility determination made based on source author’s use of the terms to describe study.
†
Same parent study as Dindo (2012)