Table 1 Study design distribution
From: COVID-19 mortality in patients with immunodeficiency and its predictors: a systematic review
Study design | Number (percent) |
|---|---|
Retrospective cohort | 9 (41%) |
Cohort study | 5 (23%) |
Case-series | 4 (18%) |
Case-report | 3 (14%) |
Cross-sectional | 1 (4%) |