Table 7. Studies used in meta-analysis of severity rate.
| Name | Author | Sample Size | num_ control | num_ treatment | severe_or adverse_control | severe_or adverse_treatment |
| A pilot study of hydroxychloroquine in the treatment of patients with common coronavirus disease 19 (COVID-19) | Chen J, et al. [20] | 30 | 15 | 15 | 0 | 1 |
| Hydroxychloroquine in patients with COVID-19: an open-label, randomized, controlled trial | Tang, et al. [24] | 150 | 80 | 70 | 7 | 21 |
| Treating COVID-19 with chloroquine | Huang, et al. [23] | 22 | 12 | 10 | 5 | O |
| Hydroxychloroquine: small effects in mild disease | Levantovsky, et al. [25] | 62 | 31 | 31 | 4 | 0 |