Development and content validation of a patient-reported endometriosis pain daily diary.

van Nooten FE, Cline J, Elash CA, Paty J, Reaney M
Health Qual Life Outcomes. 2018 Jan 4;16(1):3. doi: 10.1186/s12955-017-0819-1.
Endometriosis-related pain is best captured with patient-reported outcome (PRO) measures, however, assessment of endometriosis-related pain in clinical trials has been difficult in the absence of a reliable and valid PRO instrument. We describe the development of the Endometriosis Pain Daily Diary (EPDD), an electronic PRO developed as a survey instrument to assess endometriosis-related pain and its impact on patients’ lives.