Additional file 2 of Safety and efficacy of Ninjin’yoeito along with iron supplementation therapy for preoperative anemia, fatigue, and anxiety in patients with gynecological disease: an open-label, single-center, randomized phase-II trial

Additional file 2: Supplemental Table 2. Questionnaires of The Pittsburgh Sleep Quality Index. The Pittsburgh Sleep Quality Index is an 18-item questionnaire having 7 domains: sleep quality, sleep duration, sleep latency, sleep efficiency, sleep disturbances, use of sleeping medication, daytime sleepiness, and other dysfunctionality. Higher scores indicate more severe sleep disturbances [42].