| Authors (in order) | Schwellnus et al., (2021) | Petracek et al., (2021) | Petek et al., (2021) | Moulsen et al., (2021) | Martinez et al., (2021) | Krzywanski et al., (2021) | Hull et al., (2021) | Brito et al., (2021) |
| Country/ place of study | South Africa | USA | USA | USA | USA | Poland | UK | USA |
| Study design | Cross- sectional | Case report | Observational cohort study | Prospective observational | Cross- sectional | Observational | Retroactive case review | Cross- sectional |
| PROMs/ QOL used | Wisconsin respiratory symptom survey for severity, self-reported number of days to RTP | Unidimensional Wellness score | Outcome from Updated Lake Louise Imaging criteria | Outcome from Updated Lake Louise Imaging criteria | Cardiac screening protocol in line with ACC RTP recommendations | Routine medical screening to assess symptoms | Dataset obtained from English institute of sport performance data management system | Used a monitoring protocol to assess symptoms |
| Type of PROM | Physical symptoms | Physical symptoms | Physical symptoms | Physical symptoms | Physical symptoms | Physical symptoms | Physical symptoms | Physical symptoms |
| When PROM was used | July - October 2020 | June 2020 - Jan 2021 | September 2020 - May 2021 | September - December 2020 | May - October 2020 | July - October 2020 | February 2020 - August 2020, August 2020 - Jan 2021 | July 2020 |
| Method of application | Online survey | Questionnaire | Data from National Collegiate athletic association institutions using ORCCA registry | Data obtained from 42 colleges/ universities | Data obtained from North American professional sports leagues and players associations | Routine medical screening | Data obtained from data from UK sport institutes | Smartphone app |
| Grade | High quality | Medium quality | High quality | High quality | High quality | Medium quality | High quality | High quality |