eTable 6. Quality assessment of review articles on analgesic use in sport.
| Study (reference) | 1. Was the review planned/defined a priori? | 2. Were study selection and data extraction performed by two individuals independently? | 3. Was a comprehensive and systematic literature search performed? | 4. Were unpublished study data and gray literature included in the review? | 5. Did the review provide a a list of the studies included and excluded? | 6. Were the study characteristics (characteristics of patients, interventions, and endpoints) of the included studies reported either in table format or in detail in the text? | 7. Was the risk of bias of the included primary studies assessed according to established methods? | 8. Was the risk of bias of the included studies taken into account in the interpretation of the review findings? | 9. Was the statistical analysis of the study results appropriate? | 10. Was the potential for publication bias addressed? | 11. Were conflicts of interest addressed? |
| Alaranta et al.(2008) (19) | No | No | No | Unclear | No | No | No | No | Not applicable | Not applicable | Unclear |
| Berrsche and Schmitt (2022) (e25) | Yes | No | No | Unclear | No | Unclear | No | Yes | Not applicable | Not applicable | Unclear |
| Brune et al. (2008) (21) | No | No | No | Unclear | No | Unclear | No | No | Not applicable | Not applicable | Unclear |
| Brune et al. (2009) (22) | No | No | No | Unclear | No | Unclear | No | No | Not applicable | Not applicable | Unclear |
| Brune et al. (2009) (23) | No | No | No | Unclear | No | Unclear | No | No | Not applicable | Not applicable | Unclear |
| Ciocca (2005) (25) | Unclear | No | No | Unclear | No | No | No | No | Not applicable | Not applicable | Unclear |
| Graf-Baumann (2013) (8) | No | No | No | Unclear | No | Unclear | No | No | Not applicable | Not applicable | Unclear |
| Harle et al. (2018) (31) | Yes | Yes | Yes | Unclear | Yes | Yes | No | Yes | Not applicable | Not applicable | Unclear |
| Holgado et al. (2018) (33) | Yes | No | Yes | Unclear | No | Yes | No | No | Not applicable | Not applicable | Unclear |
| Koes et al. (2018) (37) | Unclear | No | Yes | Unclear | Unclear | Yes | No | No | Not applicable | Not applicable | Unclear |
| Leyk and Rüther (2021) (12) | Unclear | No | Yes | Unclear | Yes | No | No | No | Not applicable | Not applicable | Unclear |
| Müller-Platz et al. (2011) (e2) | No | No | No | Unclear | No | Yes | No | No | Not applicable | Not applicable | Unclear |
| Niederberger and Geisslinger (2016) (e3) | No | No | No | Yes | No | No | No | No | Not applicable | Not applicable | Unclear |
| Seidel (2015) (e12) | No | No | No | Unclear | No | No | No | No | Not applicable | Not applicable | Unclear |
| Tscholl (2014) (e17) | No | No | No | Unclear | No | No | No | No | Not applicable | Not applicable | Unclear |
| Tscholl et al. (2015) (e18) | No | No | No | Unclear | No | Yes | No | No | Not applicable | Not applicable | Unclear |
| Warden (2009) (e22) | No | No | No | Unclear | No | No | No | No | Not applicable | Not applicable | Unclear |
| Warden (2010) (e23) | No | No | No | Unclear | No | Unclear | No | No | Not applicable | Not applicable | Unclear |
AMSTAR, a measurement tool to assess systematic reviews (15)