Questions used to assess the rigour of primary studies
| # | Question |
| 1 | Are the study methods clearly reported (including study design, recruitment, data collection and analysis)? |
| 2 | Are the study methods appropriate to answer the research questions? |
| 3 | Are the sample characteristics reported to enable judgements about generalisability? |
| 4 | Are the study findings and conclusions supported by raw data? |
| 5 | Are the study limitations acknowledged and clearly reported? |