Comparing the ability of OPTION(12) and OPTION(5) to assess shared decision-making in genetic counselling.

Objectives: OPTION(12) is the most widely used tool to measure shared decision-making (SDM) in health care. A newer scale, OPTION(5), has been proposed as a more parsimonious measure that better addresses core concepts of SDM. This study compares OPTION(5) to OPTION(12) in prenatal genetic counselling.