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Study design based on ClinicalTrials.gov database compared with COVID-19 and others
| Study type | COVID-19 (n=6408) | Others (n=48926) | ALL (n=55334) | P value |
|---|---|---|---|---|
| Interventional Studies | 3622(56.52%) | 37539(76.73%) | 41161(74.39%) | <0.001 |
| Observational Studies | 2786(43.48%) | 11387(23.27%) | 14173(25.61%) | |
| -Patient Registry Studies | 369(5.76%) | 1491(3.05%) | 1860(3.36%) | <0.001 |
