Development and validation of the daily fatigue cancer scale (DFCS): Single-item questions for clinical practice.

Purpose: Cancer-Related Fatigue (CRF), subjective symptom, is considered the most prevalent and disabling in cancer. To help caregivers better understand it, we developed and evaluated the psychometric properties of a visual analog scale to assess daily CRF.

Method: In our qualitative study, we conducted interviews with caregivers, patients and scientists (N = 30) to generate items and select the scale's format.