... timing, and degree of interference in ADLs[21]. The scores from the 4 dimensions are summed tocalculate the Global Fatigue Index (GFI), which ranges from 1 (indicating no fatigue) to 50 (indicating ... better understandFM patients in the US by conducting a comprehensiveevaluation of their clinical and comorbid profile, and the impact of FM severity on HRQoL, symptom domains(such as, pain, sleep, ... doing laundry, climbing stairs, shopping, yardwork, driving a car, visiting friends, washing dishes,vacuuming, making beds, and walking several blocks)was evaluated using the FIQ Physical Impairment...