What are the key considerations for determining the accuracy of a risk tool for Chronic Heart Failure?
The key considerations for determining the accuracy of a risk tool for Chronic Heart Failure include sensitivity and specificity of the tool at clinically relevant thresholds, such as a threshold of 50% risk of mortality at 1 year. Depending on how the tool is used, high specificity may also be crucial as wrongly categorising a person at high risk of death could have negative consequences for that person and their family. In addition, accuracy data from studies should be graded for risk of bias and indirectness to ensure they are reliable.  