Fig. 1

Risk perception amongst individual interview participants. a Participants were asked to indicate their perceived risk of amniocentesis. This was entirely based on prior knowledge of the test. They were not provided with any additional information to skew their response. b Interpretation of a hypothetical risk of 1 in 200 births (1:200) for Down syndrome. Patients indicated their understanding of this 1:200 risk with a mark on a horizontal line representing 0–100% chance of Down syndrome. Only participants who successfully completed these tasks are included (some did not perform one or both of the tasks at all). Objective risk is indicated with black line at the value of 0.5%