Address Heart Failure Patient-Reported Outcome Issues
Researchers from FDA and several hospitals say there is increasing interest in using patient-reported outcomes (PROs) as endpoints in heart failure trials and regulatory bodies have shown a willingness to consider heart failure drugs and devices for approval based on improvement in PROs. Writing in the journal Circulation, the researchers say several issues need to be resolved before the use of PROs can be successfully implemented:
- there is no consensus on the optimal tool to measure PROs or the appropriate timing and frequency of PRO assessments in heart failure tests;
- among the two most commonly used tools, there is no universal definition of what constitutes a minimal clinically important difference;
- the ideal statistical method to compare changes in PROs in intervention and control groups is unclear; and
- some trials have shown no benefit in PROs despite improving clinical outcomes that would be expected to affect quality of life and more discussion is needed on how to interpret this finding and the discordant benefit needs.