Table A1:
Risk of Biasa Among Systematic Reviews (ROBIS Tool)
| Author, Year | Phase 2 | Phase 3 | |||
|---|---|---|---|---|---|
| Study Eligibility Criteria | Identification and Selection of Studies | Data Collection and Study Appraisal | Synthesis and Findings | Risk of Bias in the Review | |
| Arnberg et al, 201420 | Highb | Low | Low | Low | Low |
| Adelman et al, 20147 | Low | Low | Low | Low | Low |
| Andrews et al, 201821 | Low | Low | Low | Low | Low |
| Richards et al, 201524 | Low | Low | Low | Low | Low |
| Kampmann et al, 201625 | Low | Low | Highc | Low | High |
| Dedert et al, 201323 | Higha | Low | Low | Low | Low |
| Kaltenthaler et al, 200822 | Low | Highd | Highe | Low | Low |
Abbreviation: ROBIS, Risk of Bias in Systematic Reviews.
a
Possible risk of bias levels: low, high, unclear.
b
Potential bias due to language restrictions.
c
Potential bias as additional methods to database searching were not used. Unclear how passive and active control is defined.
d
Potential bias due to single reviewer for data extraction.
e
Unlcear if double reviewer for data extraction.