Standardizing abortion research outcomes (STAR): Results from an international consensus development study.

Objective: To develop a minimum data set, known as a core outcome set, for future abortion randomized controlled trials.

Study Design: We extracted outcomes from quantitative and qualitative systematic reviews of abortion studies to assess using a modified Delphi method. Via email, we invited researchers, clinicians, patients, and healthcare organization representatives with expertise in abortion to rate the importance of the outcomes on a 9-point Likert scale.