DISCUSSION
Participants with insomnia had higher scores on dysmenorrhea severity and interference than PNI, dysmenorrhea severity was directly related to ISI scores, and dysmenorrheainterferencewasdirectlyrelatedtoscoresontheISIand thePSQI.Additionally,sleepfragmentation(waketimeafter sleeponsetandnumberofawakenings)variedbetweenmenstrual phases. Sleep onset latency, number of awakenings, sleep efficiency, and sleep quality ratings varied across dysmenorrhea severity groups. Scores on sleep variables were comparable for those participants using hypnotics and those notusinghypnotics,suggestingthatthisisnotaconfounding factor.