On subjective measures of decision quality.

In times of person-centered care, it is all the more important to support patients in making good decisions about their care. One way to offer such support to patients is by way of Patient Decision Aids (PDAs). Ranging from patient brochures to web-based tools, PDAs explicitly state the decisions patients face, inform them about their medical options, help them to clarify and discuss their values, and ultimately make a decision. However, lingering discussions surround effectiveness research on PDAs. In this article, I focus on two subjective measures of decision quality that are widely used as outcome measures in effectiveness research on PDAs (i.e., the Decisional Conflict Scale (DCS) and measures of regret). Although these measurement instruments have attracted critical attention in the scientific literature, bioethicists have hardly engaged with them. Therefore, I set myself to analyze the relationship between (the different subscales of) the DCS and measures of regret, on the one hand, and ethical principles such as beneficence and autonomy, on the other hand. In light of that analysis, I will clarify some discussions regarding the use of these measures of decision quality in effectiveness research on PDAs. This should help us to align the way we evaluate PDAs with ethical principles and avoid that our attempts to support patients in making good decisions about their care that is so central to person-centered care point in unethical directions.