The use of stated preference methods in health economics aims to reflect the benefit assessments of therapy features from patient's or expert perspective. So far it is unclear how this evidence is documented in benefit assessment of medical interventions and how the findings will be made available to decision-makers. Based on the findings of this review the evidence of patient preferences in diabetes treatment is synthesized. The results show the relative importance based on a derived ranking score of the used patient-relevant endpoints. The ranking allows the comparison of the results of the identified preference studies.