Concordance analysis of the Short-Form of the PROBAST as a Screening Tool: Two-Step Risk of Bias Assessment showing only Underestimation of Risk of Bias

Key Points

• The aim is to evaluate the concordance of the Short-Form PROBAST with full PROBAST in assessing risk of bias in prediction models.
• Applied SF-PROBAST and compared it with PROBAST scores for methodological quality assessment.
• Conducted a two-step risk of bias assessment.
• Recommended using full PROBAST on studies flagged with low or unclear risk of bias by SF-PROBAST.
• SF-PROBAST showed good agreement with PROBAST scores.
• Identified a consistent underestimation of risk of bias in certain studies with SF-PROBAST.