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Table 4 Risk of bias assessment

From: Prognostic value of patient-reported outcome measures in adult heart-transplant patients: a systematic review

Author Study participation Study attrition Prognostic factor measurement Outcome measurement Study confounding Statistical Analysis and reporting Overall risk of bias
Delgado (2015) Low Moderate Low Moderate Moderate Low Moderate
Farmer (2013) Moderate Moderate Moderate Moderate Moderate Low Moderate
Harper (1998) Moderate High High Moderate High Moderate High
O’Brien (1987) Moderate High Moderate Moderate Moderate Low Moderate
White-Williams (2013) Moderate Moderate Moderate Low Low Low Low