Minimal Clinically Important Difference of the Multidimensional Fatigue Symptom Inventory-Short Form (MFSI-SF) for Fatigue Worsening in Asian Breast Cancer Patients

The MCID of the MFSI-SF identified by all approaches ranged from 4.50 to 10.79 points. The MCID can be used to interpret the clinical significance of fatigue deterioration in patients with breast cancer and to determine sample sizes for future clinical trials.