Table 3.
Author/year | Bias due to confounding | Bias in the selection of participants into the study | Bias in classification of interventions | Bias due to deviations from the intended interventions | Bias due to missing data | Bias in measurement of outcomes | Bias in selection of the reported results | Overall bias |
---|---|---|---|---|---|---|---|---|
Carr 200764 | NI | Low | Low | Serious | Low | Serious | Low | Serious |
Malow 202128 | Serious | Low | Low | NI | Serious | Serious | Low | Serious |
vanGeijlswijk 201127 | Serious | Low | Low | NI | Serious | Serious | Low | Serious |
Zwart 201765 | Serious | Low | Low | Serious | NI | Serious | Low | Serious |
NI: No information.