Study Selection Studies were included if they reported the construction/validation of a PRO instrument for patients with cirrhosis or if they assessed the clinical variables that determined responses to established PRO scales and reported granular data specific domains/responses within the scales. As above, we defined PRO as patients’ own assessment of their health status including symptoms, reports of daily functioning, quality of life and satisfaction with healthcare. For example, if a study on quality of life provided details on these domains it was included, but if it only reported summary scores from a previously developed instrument (such as Short Form-36; SF-36) then it was excluded.