Table 1.
Study characteristics
| Characteristic | Value | 
| No (%) of studies registered | 373 (88.8) | 
| No (%) of studies by publication status: | |
| Preprint | 96 (22.9) | 
| Published | 278 (66.1) | 
| Unpublished | 46 (11.0) | 
| Median (IQR) No of patients | 101 (50-238) | 
| No (%) of studies by country: | |
| United States | 73 (17.4) | 
| Iran | 67 (16.0) | 
| Brazil | 52 (12.4) | 
| India | 43 (10.2) | 
| China | 41 (10.0) | 
| No (%) of studies by intensity of care: | |
| Outpatient | 86 (20.5) | 
| Inpatient | 312 (74.3) | 
| ICU | 24 (5.7) | 
| No (%) of studies by illness severity: | |
| Mild/moderate | 89 (21.2) | 
| Severe/critical | 42 (10.0) | 
| Median (IQR) percentage of patients mechanically ventilated at baseline | 2.8 (0.0-33.0) |