Adaptive Compared With Persistent Fatigue in Allogeneic Hematopoietic Cell Transplantation Survivors
Eileen Danaher Hacker, Debra Sipes-Fears, Rae Lee Richards, Kelly Wierenga, Gisele Tlusty, Susan J. PresslerBackground:
Clearly demarcating the differences between adaptive fatigue, a normal physiological phenomenon, and persistent fatigue, a symptom that requires treatment, is vital for phenotypic characterization in allogeneic hematopoietic cell transplantation (alloHCT) survivors.
Objective:
This study compared the phenotypic characteristics (symptoms and behavioral manifestations) of alloHCT survivors with adaptive versus persistent fatigue using 2 approaches to categorize fatigue.
Methods:
This 2-group, comparative study examined differences in sleep, emotional distress, cognitive functioning, and pain in 38 alloHCT survivors with adaptive compared with persistent fatigue using 2 approaches to classify fatigue (Fatigue Severity Scale cut scores and responses to standard clinical questions regarding occurrence, duration, and resolution of fatigue with rest).
Results:
More alloHCT survivors were classified as having persistent fatigue (
Conclusions:
Persistent fatigue is empirically different from adaptive fatigue. The phenotypic characteristics differed depending on the classification method (cut scores on the Fatigue Severity Score or responses to standard clinical questions). Understanding how methods to classify fatigue influenced the results is important to avoid under- or overtreatment of persistent fatigue and the co-occurring symptoms and behavioral manifestations. Recognizing and identifying therapeutic targets for persistent fatigue is essential for delivering comprehensive survivorship care in alloHCT survivors.