Table 3
Overview of risk of bias
| AARTUN | Burton | Coenen | Grimmer | Kjaer | Mikkelsson | Sjolie | Szpalski | |
|---|---|---|---|---|---|---|---|---|
| Overall rating | Poor | Poor | Good | Fair | Fair | Fair | Poor | Poor |
| Risk of bias | Reporting bias Misclassification bias Differential drop outs Analytical bias Selective outcome reporting | Selection bias Reporting bias Misclassification bias Loss to follow-up | Selection bias | Misclassification bias Loss to follow-up Analytical bias | Selection bias Reporting bias Misclassification bias | Reporting bias Misclassification bias | Reporting bias Misclassification bias Analytical bias | Selection bias Reporting bias Misclassification bias Analytical bias Selective outcome reporting |