4.

Forest plots of sensitivity and specificity. The squares represent the sensitivity and specificity of one study, the black line its confidence interval. Studies are grouped by reported cut‐off value. If a study reported accuracy data for more than one cut‐off, its results are included in more than one subgroup. TP = True Positive; FP = False Positive; FN = False Negative; TN = True Negative.

Forest plot of the included studies. TP = True Positive; FP = False Positive; FN = False Negative; TN = True Negative. Between brackets the 95% confidence intervals (CI) of sensitivity and specificity. The figure shows the estimated sensitivity and specificity of the study (blue square) and its 95% confidence interval (black horizontal line).