Chen, Chen X.Murphy, TabithaOfner, SusanYahng, LilianKrombach, PeterLaPradd, MichelleBakoyannis, GiorgosCarpenter, Janet S.2020-11-102020-11-102020-07-17Chen, C. X., Murphy, T., Ofner, S., Yahng, L., Krombach, P., LaPradd, M., Bakoyannis, G., & Carpenter, J. S. (2020). Development and Testing of the Dysmenorrhea Symptom Interference (DSI) Scale. Western journal of nursing research, 193945920942252. Advance online publication. https://doi.org/10.1177/0193945920942252https://hdl.handle.net/1805/24363Dysmenorrhea affects most reproductive-age women and increases the risk of future pain. To evaluate dysmenorrhea interventions, validated outcome measures are needed. In this two-phase study, we developed and tested the dysmenorrhea symptom interference scale. During the scale-development phase (n = 30), we created a nine-item scale based on qualitative data from cognitive interviews. During the scale-testing phase (n = 686), we evaluated reliability, validity, and responsiveness to change. The scale measures how dysmenorrhea symptoms interfere with physical, mental, and social activities. Internal consistency was strong with Cronbach's α > 0.9. Test-retest reliability was acceptable (r = 0.8). The scale showed satisfactory content validity, construct validity (supported by confirmatory factor analysis), concurrent validity, and responsiveness to change. The minimally important difference was 0.3 points on a scale with a possible total score ranging from 1 to 5. This new psychometrically sound scale can be used in research and clinical practice to facilitate the measurement and management of dysmenorrhea.IUPUI Open Access Policypsychometricsdysmenorrheapatient reported outcome measurespelvic painArticle