Measurement of CRF
The Cancer Fatigue Scale (CFS) was designed by Okuyama and validated by
307 cancer patients19. CFS includes 15 items, with a
total score of ≤5 for no fatigue, 6-15 for mild fatigue, 16-30 for
moderate fatigue, and 31-60 for severe fatigue. The scale has been used
in different cancer patients. It has been verified that the scale is
simple and easy to complete, even for patients with advanced cancer.