Which uncertainty about decision regret is actionable?
The decision is whether to fund another study of decision regret after contralateral prophylactic mastectomy, and if so, what that study should measure. This publication focuses on factors associated with regret among women at high hereditary breast cancer risk, but its title alone does not establish which factors were measured, their effect sizes, or whether they can be changed through decision support. For a value of information analysis, the priority would not automatically be the factor with the strongest reported association. It would be the uncertain factor whose better measurement could alter a concrete choice, such as the design or allocation of decision-support resources. That requires separating potentially actionable factors from fixed descriptors and identifying the decision threshold each estimate might cross. The paper's full methods and results would therefore be needed before judging whether another measurement study could change resource allocation rather than merely describe regret more precisely.