Table 1.
Characteristics of the included references
| Authors, month/year, reference |
Country (institute) | Evidence-base | Funding, CoI |
Long COVID definition | Patient population |
|---|---|---|---|---|---|
| (Living) guidelines | |||||
| Shah et al. 12/2020 [5] |
UK (NICE, RCGP, SIGN) |
Consensus-based | NR | Symptoms for > 4 weeks after the acute infection | Pts. treated at the hospital & on community level (e.g. at home) |
| 04/2021 [10] | UK (NHS) | Consensus-based | NR | ||
| 2021 [11] | USA (CDC) | NR | NR | NR | NR |
|
Koczulla et al. 7/2021 [7] |
GER | Consensus-based | NR | Symptoms for > 4 weeks after the acute infection | Pts. treated at the hospital & on community level (e.g. at home) |
|
Rabady et al. 7/2021 [12] |
AT | Consensus-based |
Funding: NR CoI: None |
Symptoms for > 4 weeks after the acute infection | Pts. treated at the hospital (except ICU) & on community level (e.g. at home) |
| Reviews | |||||
| 03/2021 [2] | UK (NIHR) | Evidence-based | NR | NR | Pts. treated at the hospital & on community level (e.g. at home) |
|
Parkin et al. 03/2021 [13] |
UK | NR |
Funding: Leed Clinical Commissioning Group, University of Lees Medical Research Council Confidence in Concept grant CoI: None |
Symptoms for > 4 weeks after the acute infection | |
|
Oronsky et al. 2021 [14] |
USA | NR | NR | NR | NR |
|
Rajan et al. 03/2021 [3] |
European countries, e.g. UK, GER, IT, BE | NR |
Funding: NIHR, ARC EM, Leicester Biomedical Research Centre CoI: Two authors reported CoI |
Symptoms for > 6 weeks after the acute infection | NR |
| Expert papers | |||||
| Consensus paper | |||||
| Barker-Davis et al. 05/2020 [15] | UK | Consensus-based |
Funding: None CoI: None |
NR | Active pts. including military personnel & athletes |
| Clinical perspectives | |||||
| Greenhalgh et al. 2020 [16] | UK | Consensus-based |
Funding: None CoI: None |
Symptoms for > 4 weeks after the acute infection | Pts. treated at the hospital and on community level (e.g. at home) |
|
Spruit et al. 2020 [17] |
NL | Consensus-based |
Funding: NR CoI: Three authors reported CoI |
Symptoms for 4–12 weeks after the acute infection | Pts. treated at the hospital |
|
Halle et al. 2021 [18] |
GER | Consensus-based |
Funding: NR CoI: None |
NR | NR |
|
Leo et al. 2020 [19] |
GER | Consensus-based |
Funding: NR CoI: None |
NR | Pts. treated at the hospital and on community level (e.g. outpatient, at home) |
Abbreviations: ARC EM Applied Research Collaboration East Midlands, AT Austria, BE Belgium, CDC Centers for Disease Control and Prevention, CoI Conflict of interest, COVID Coronavirus disease, GER Germany, ICU Intensive care unit, IT Italy, NHS National Health Services, NICE National Institute for Health Care Excellence, NIHR National Institute for Health Research, NL The Netherlands, NR Not reported, Pts. Patients, RCGP Royal College of General Practitioners, SIGN Scottish Intercollegiate Guidelines Network, UK United Kingdom, USA United States of America