A Systematic Review and Meta-Analysis of Risk Factors Associated with Severity and Death in COVID-19 Patients
Table 2
Risk of bias using QUIPS tool.
Study (PMID)
Study participation (max. 15)
Study attrition (max. 15)
Prognostic factor measurement (max. 15)
Outcome measurement (max. 15)
Statistical analysis and reporting (max. 15)
Quality score (max. 75)
32217556
15
12.5
12.5
15
15
70
32217650
15
12.5
15
15
15
72.5
32269088
15
12.5
12.5
15
15
70
32188484
15
10
12.5
15
15
67.5
32294485
15
12.5
15
15
15
72.5
32304745
15
10
12.5
15
15
67.5
31986264
15
10
12.5
15
15
67.5
32031570
15
10
12.5
15
15
67.5
32105632
15
10
12.5
15
15
67.5
32109013
15
10
12.5
15
15
67.5
32167524
15
10
12.5
15
15
67.5
32171076
15
12.5
12.5
15
15
70
32191764
15
10
10
15
12.5
62.5
32173725
15
12.5
12.5
15
15
70
32176772
15
10
12.5
15
15
67.5
32409504
15
10
12.5
15
15
67.5
32564693
15
12.5
10
15
15
67.5
QUIPS: quality in prognosis studies; the quality of the studies was ranked high if ≥60 points (≥80% of the maximum score); moderate if 45–59 points (≥60% and <80% of the maximum score); and low if <45 points (<60% of maximum score).
