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. 2021 May 26;10:155. doi: 10.1186/s13643-021-01689-3

Fig. 4.

Fig. 4

ELISA methodological quality summary table and graph. a Risk of bias and applicability concerns summary: review authors’ judgements about each domain for each included study. b QUADAS-2 bias assessment and QUADAS-2 applicability assessment item presented as percentages across all included studies. On the left, risk of bias graph and on the right applicability concerns graph. c Risk of bias and applicability concerns summary: review authors. Low, low risk of bias; high, high risk of bias; unclear, bias is unclear