50 Chapter 2 Studies Bias due to confounding Bias in participant selection Bias in intervention classification Bias due to deviations from intended interventions Missing data Bias in outcomes measurements Bias in reported results Overall risk of bias Berthocchi 2020 Moderate Moderate Moderate NA NA NA NA NA Kowalewski 2017 Moderate Moderate Low Low Low Moderate Moderate Moderate Yiğitoğlu 2021 Serious Moderate Moderate Moderate Moderate Serious Moderate Serious Nardo 2016 Serious Moderate Moderate Moderate Moderate Serious Moderate Serious Gabriel 2016 Low Low NA NA Low Low Low NA Low 2022 Moderate Low Moderate Moderate Moderate Serious Moderate Serious * Multiple studies within the same database Abbreviation: NA: not applicable
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