The MFSI-SF demonstrated moderate test-retest reliability in a small number of studies .
The MFSI-SF fatigue subscales were positively correlated with measures of distress , depressive , and anxious symptoms .
Purpose Fatigue is a subjective complaint that is believed to be multifactorial in its etiology and multidimensional in its expression .
Fatigue may be experienced by individuals in different dimensions as physical , mental , and emotional tiredness .
The purpose s of this study were to review and characterize the use of the 30-item Multidimensional Fatigue Symptom Inventory-Short Form ( MFSI-SF ) in published studies and to evaluate the available evidence for its psychometric properties .
The longitudinal relationship between fatigue and sleep in breast cancer patients undergoing chemotherapy.
STUDY OBJECTIVE Fatigue and sleep disturbances are two of the most common and distressing symptoms of cancer patients . A relationship between the two symptoms was reported in symptom cluster studies ; however , only subjective measurements of sleep were examined and most studies were cross-sectional . In this study of women with breast cancer undergoing chemotherapy  , we explored the longitudinal relationship between fatigue and sleep measured both subjectively and objective ly . DESIGN Prospect i ve study . Data were collected at 7 time points : before ( baseline ) and during the 3 weeks of cycle 1 and cycle 4 chemotherapy . PARTICIPANTS Ninety-seven women with newly diagnosed stage I-III breast cancer who were scheduled to receive at least four 3-week cycles of chemotherapy .  MEASUREMENT AND RESULTS Objective sleep parameters were measured with an Actillume actigraph ( Ambulatory Monitoring Inc. ) . Subjective sleep quality was assessed with the Pittsburgh Sleep Quality Index ( PSQI ) . Fatigue was assessed with the Multidimensional Fatigue Symptom Inventory-Short Form ( MFSI-SF ) . Fatigue became worse during both cycles of chemotherapy ( P-values < 0.01 ) . Subjective sleep quality was poor at baseline and remained unchanged throughout treatment . Objective nighttime and daytime total sleep time increased compared to baseline during the treatment administration week of both cycles ; daytime total wake time decreased during the treatment week of both cycles and during the last 2 week of cycle 4 . Mixed model results revealed that fatigue was positively associated with total PSQI scores and with objective measures of total nap time , and negatively associated with total wake time during the day ( all P-values < 0.01 ) . CONCLUSION Fatigue was significantly associated with subjective reports of poor sleep and objective measures of daytime sleepiness , but not with nocturnal sleep as measured with actigraphy . This relationship between fatigue and sleep warrants further studies to explore their possible common underlying etiology
The MFSI-SF demonstrated moderate test-retest reliability in a small number of studies .
The MFSI-SF fatigue subscales were positively correlated with measures of distress , depressive , and anxious symptoms .
Purpose Fatigue is a subjective complaint that is believed to be multifactorial in its etiology and multidimensional in its expression .
Fatigue may be experienced by individuals in different dimensions as physical , mental , and emotional tiredness .
The purpose s of this study were to review and characterize the use of the 30-item Multidimensional Fatigue Symptom Inventory-Short Form ( MFSI-SF ) in published studies and to evaluate the available evidence for its psychometric properties .