Lee's Fatigue Scale (LFS)
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A visual analogue scale to evaluate fatigue severity (LFS) was developed by Lee et al (1991). Original Lee's fatigue scale was modified from a 100 mm visual analogue scale format to 0-10 numeric rating scale (NRS) to assess fatigue and energy (Miaskowski & Lee,1999). Miaskowski, C., & Lee, K. A. (1999). Pain, fatigue, and sleep disturbances in oncology outpatients receiving radiation therapy for bone metastasis: a pilot study. Journal of pain and symptom management, 17(5), 320-332.