Abstract
Objective
To determine whether poststroke fatigue at admission is associated with the degree of independence in activities of daily living in patients with stroke at discharge from subacute rehabilitation wards.
Design
Retrospective cohort study.
Setting
Subacute rehabilitation hospital.
Participants
A consecutive sample of patients (N=156) with stroke who were admitted to a subacute rehabilitation ward between December 2012 and November 2013 were enrolled in the study.
Interventions
Not applicable.
Main Outcome Measures
Poststroke fatigue was assessed using the Fatigue Severity Scale within 2 weeks of admission. Poststroke fatigue was defined as the mean score of 4 points or more from among 9 items in the Fatigue Severity Scale. Functional outcome was assessed by using FIM motor items.
Results
Fifty-six (35.9%) of the 156 participants had poststroke fatigue at admission. The scores of the FIM motor items at admission and discharge were significantly lower in the fatigue group than in the nonfatigue group (P<.05). Multiple regression analysis with potentially confounding variables revealed that poststroke fatigue was a significant independent factor for discharge FIM motor items score (P<.05).
Conclusion
Poststroke fatigue at admission was significantly associated with functional outcome at discharge from subacute rehabilitation wards. Our findings emphasize that rehabilitation professionals need to manage poststroke fatigue in addition to providing the interventions to improve daily activities in patients with subacute stroke.
Poststroke fatigue has been described as a feeling of early exhaustion with weariness, lack of energy, and aversion to effort that develops during physical or mental activity and is usually not ameliorated by rest.
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Estimates of the prevalence of poststroke fatigue range from 25% to 85%.
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Poststroke fatigue predicts a lower rate of returning to work, poorer quality of life outcome, and a higher risk of death in individuals with stroke.
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Post-stroke fatigue is associated with impaired processing speed and memory functions in first-ever stroke patients.
, 7Fatigue in the acute phase after first stroke predicts poorer physical health 18 months later.
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However, poststroke fatigue remains a neglected symptom after stroke in clinical practice.
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Evidence-based interventions for poststroke fatigue have not been established.
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The relationship between poststroke fatigue and activities of daily living (ADL) remains controversial.
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Post-stroke fatigue is an independent predictor of post-stroke disability and burden of care: a path analysis study.
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Fatigue after stroke: frequency and effect on daily life.
Poststroke fatigue has been reported to be longitudinally associated with instrumental ADL and health-related quality of life, but not with basic ADL, between 6 and 36 months after stroke.
8- van de Port I.G.
- Kwakkel G.
- Schepers V.P.
- Heinemans C.T.
- Lindeman E.
Is fatigue an independent factor associated with activities of daily living, instrumental activities of daily living and health-related quality of life in chronic stroke?.
One longitudinal study demonstrated that acute-phase fatigue within 2 weeks after the onset of stroke was associated with the inability of patients to be completely independent in ADL measures at 18 months after stroke, even when controlling for potentially confounding variables such as age and baseline ADL.
17Acute-phase fatigue predicts limitations with activities of daily living 18 months after first-ever stroke.
However, information on whether poststroke fatigue at baseline is associated with the degree of independence in future ADL is lacking. Additionally, more than half of the participants in the previously mentioned study
17Acute-phase fatigue predicts limitations with activities of daily living 18 months after first-ever stroke.
discontinued their rehabilitation program before the end of the study. Therefore, it remains unclear whether poststroke fatigue at baseline is associated with functional outcomes when all patients continue rehabilitation, which has been shown to be a strong confounder for outcomes.
In subacute rehabilitation wards, intensive rehabilitation programs are provided during hospitalization to improve the ability of patients with subacute stroke to perform ADL.
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We hypothesized that poststroke fatigue would be associated with greater dependence in ADL at discharge from subacute rehabilitation wards, because fatigue may cause stroke patients to avoid or reduce physical activity.
19- Saunders D.H.
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Physical activity and exercise after stroke: review of multiple meaningful benefits.
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Factors associated with post-stroke physical activity: a systematic review and meta-analysis.
Evidence supporting this hypothesis would provide a rationale for treating poststroke fatigue in subacute rehabilitation wards. Thus, this study aimed to determine whether poststroke fatigue at admission was associated with levels of independence in ADL at discharge from a subacute rehabilitation ward, even when controlling for potentially confounding variables.
Discussion
This study appears to be the first to determine whether poststroke fatigue is associated with levels of independence in ADL at discharge from a subacute rehabilitation ward. Upon admission to the subacute rehabilitation ward, 35.9% of participants with stroke had fatigue. This finding is consistent with those of previous studies reporting that more than one-third of patients have fatigue within the first 3 months after the onset of stroke.
3- Wu S.
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Model of understanding fatigue after stroke.
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Clinically significant fatigue after stroke: a longitudinal cohort study.
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Prevalence of fatigue in patients 3 months after stroke and association with early motor activity: a prospective study comparing stroke patients with a matched general population cohort.
In addition to neurophysiological factors, comorbidities have also been associated with poststroke fatigue.
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- Kim J.S.
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Poststroke fatigue: emerging evidence and approaches to management: a scientific statement for healthcare professionals from the American Heart Association.
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- Hénon H.
Factors associated with poststroke fatigue: a systematic review.
Comorbidities such as hypertension and diabetes mellitus may produce fatigue by themselves.
4- Hinkle J.L.
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- Kim J.S.
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Poststroke fatigue: emerging evidence and approaches to management: a scientific statement for healthcare professionals from the American Heart Association.
However, we found no significant differences in the proportions of participants with a given comorbidity when comparing between the fatigue and nonfatigue groups. Therefore, the fatigue that participants experienced in this study may not be attributed solely to these comorbidities. The scores of the FIM motor items at admission and discharge were significantly lower in the fatigue group than in the nonfatigue group, even when comparing between 56 matched pairs based on age and sex. Moreover, our results indicated that poststroke fatigue at admission was a significant independent variable for the score of FIM motor items at discharge from a subacute rehabilitation ward, even when controlling for potential confounding variables.
The lower FIM motor scores in participants with poststroke fatigue at admission support the findings of previous cross-sectional studies indicating that poststroke fatigue was significantly associated with ADL limitations in individuals with stroke.
9- Glader E.L.
- Stegmayr B.
- Asplund K.
Poststroke fatigue: a 2-year follow-up study of stroke patients in Sweden.
,13- Chen Y.K.
- Qu J.F.
- Xiao W.M.
- et al.
Poststroke fatigue: risk factors and its effect on functional status and health-related quality of life.
,14- Mandliya A.
- Das A.
- Unnikrishnan J.P.
- Amal M.G.
- Sarma P.S.
- Sylaja P.N.
Post-stroke fatigue is an independent predictor of post-stroke disability and burden of care: a path analysis study.
The level of baseline ADL function in addition to age, stroke type, motor impairment, neurologic status, and comorbidities have been reported as factors associated with the outcome of ADL.
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Formula for predicting FIM for stroke patients at discharge from an acute ward or convalescent rehabilitation ward.
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Therefore, we conducted multiple regression analysis, while controlling for these potentially confounding variables, to examine the relationship between poststroke fatigue at admission and the FIM motor score at discharge. We consequently revealed that poststroke fatigue was a significant independent variable for lower FIM motor score at discharge. A previous longitudinal study also reported that ADL function and fatigue in the acute phase were independent factors for activity limitations at 18 months after stroke onset,
17Acute-phase fatigue predicts limitations with activities of daily living 18 months after first-ever stroke.
which was similar to our results. However, there were 2 major differences between the previous study
17Acute-phase fatigue predicts limitations with activities of daily living 18 months after first-ever stroke.
and the current study. First, the dependent variable used in the multiple regression analysis was different. In the previous study,
17Acute-phase fatigue predicts limitations with activities of daily living 18 months after first-ever stroke.
the dependent variable was defined as whether participants could be completely independent in ADL at 18 months after stroke, whereas our study focused on examining whether poststroke fatigue was related to the degree of dependence in ADL. Another difference was whether participants continued rehabilitation programs until the end of the study. In the previous study,
17Acute-phase fatigue predicts limitations with activities of daily living 18 months after first-ever stroke.
more than half of the participants discontinued rehabilitation services before the end of the study, whereas our study included participants with subacute stroke who were admitted to a rehabilitation hospital and underwent an intensive rehabilitation program to improve ADL throughout the study period. Thus, our study was well controlled with regards to rehabilitation, which has been shown to be a strong confounder for overall outcomes. The findings of the present study offer compelling evidence that poststroke fatigue at admission is associated with levels of independence in ADL at discharge, even after patients underwent intensive rehabilitation programs during the course of hospitalization. These 2 key differences from the previously mentioned study
17Acute-phase fatigue predicts limitations with activities of daily living 18 months after first-ever stroke.
are considered to be the main strengths of this study.
A systematic review
20- Thilarajah S.
- Mentiplay B.F.
- Bower K.J.
- et al.
Factors associated with post-stroke physical activity: a systematic review and meta-analysis.
reported that poststroke fatigue was a factor associated with physical activity in individuals with stroke. Strong evidence indicates that physical activity such as cardiorespiratory endurance exercise improves the ability to perform ADL in individuals with stroke.
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Patients with poststroke fatigue have poor adherence to rehabilitative efforts because of the significant decrease in physical and mental energy, which may negatively affect improvement in ADL.
13- Chen Y.K.
- Qu J.F.
- Xiao W.M.
- et al.
Poststroke fatigue: risk factors and its effect on functional status and health-related quality of life.
,19- Saunders D.H.
- Greig C.A.
- Mead G.E.
Physical activity and exercise after stroke: review of multiple meaningful benefits.
Further studies monitoring the amount of physical activity could explore whether poststroke fatigue at admission leads to the avoidance of physical activity during rehabilitation, which then contributes to ADL limitations at discharge.
The minimal clinically important difference (MCID) for the FIM motor score in patients with stroke was reported to be 17 points.
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Determination of the minimal clinically important difference in the FIM instrument in patients with stroke.
The mean gain in the FIM motor score was higher than the MCID, even in the fatigue group. In addition, we found no significant differences in the overall FIM gain score in motor scores between the groups. The mean difference in the FIM motor score at discharge between the fatigue and nonfatigue groups was –8.4 points, which was less than the MCID. Furthermore, multiple regression analysis showed that 4 independent variables explained only 55.8% of the overall variability in the FIM motor score at discharge and the beta coefficient for fatigue was relatively small. Therefore, the influence of poststroke fatigue on improvements in ADL observed in this study was clinically vague, although poststroke fatigue at admission was a statistically significant independent variable for the FIM motor score at discharge. These results may be at least partly attributed to the degree of fatigue experienced in the fatigue group. The median Fatigue Severity Scale score in the fatigue group was 4.56 points, which is only slightly higher than 4 points. Thus, the participants in the fatigue group appeared to have only mild fatigue, which may have reduced the effect of fatigue on functional outcomes in this study. Nonetheless, poststroke fatigue is known to be related to lower levels of physical activity,
20- Thilarajah S.
- Mentiplay B.F.
- Bower K.J.
- et al.
Factors associated with post-stroke physical activity: a systematic review and meta-analysis.
a lower rate of returning to work,
5- Andersen G.
- Christensen D.
- Kirkevold M.
- Johnsen S.P.
Post-stroke fatigue and return to work: a 2-year follow-up.
,6- Pihlaja R.
- Uimonen J.
- Mustanoja S.
- Tatlisumak T.
- Poutiainen E.
Post-stroke fatigue is associated with impaired processing speed and memory functions in first-ever stroke patients.
and poor quality of life outcomes.
7Fatigue in the acute phase after first stroke predicts poorer physical health 18 months later.
,8- van de Port I.G.
- Kwakkel G.
- Schepers V.P.
- Heinemans C.T.
- Lindeman E.
Is fatigue an independent factor associated with activities of daily living, instrumental activities of daily living and health-related quality of life in chronic stroke?.
Furthermore, patients with poststroke fatigue lack the energy necessary to perform activities, are more easily tired by activity, experience unpredictable and unexplainable feelings of fatigue, and have increased stress sensitivity and an increased need for longer sleep durations, naps, or rest.
38- Eilertsen G.
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Experiences of poststroke fatigue: qualitative meta-synthesis.
The main purposes of the subacute rehabilitation wards are not only to improve ADL, but also to avoid prolonged bed rest, to facilitate home discharge, and to improve quality of life. As poststroke fatigue is a modifiable variable,
20- Thilarajah S.
- Mentiplay B.F.
- Bower K.J.
- et al.
Factors associated with post-stroke physical activity: a systematic review and meta-analysis.
rehabilitation professionals in subacute rehabilitation wards need to manage poststroke fatigue in addition to providing intensive rehabilitation programs. Education programs, mindfulness-based stress reduction therapy, and physical training have been reported as promising strategies for the treatment of poststroke fatigue.
12- Wu S.
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Interventions for post-stroke fatigue.
Psychological and exercise interventions are also recommended to reduce fatigue in other conditions such as multiple sclerosis,
39The pharmacological and non-pharmacological interventions for the management of fatigue related multiple sclerosis.
cancer,
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and chronic fatigue syndrome.
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The efficacy of these interventions should be investigated in future randomized controlled trials with more robust study designs and adequate sample sizes.
Study limitations
This study had the following limitations. First, we did not include data for depressive symptoms, medications, and pain, which might be confounding factors. We cannot exclude the possibility that depression was a confounding factor between poststroke fatigue at admission and functional outcome in the present study, although poststroke fatigue has been distinguished from depressive symptoms.
4- Hinkle J.L.
- Becker K.J.
- Kim J.S.
- et al.
Poststroke fatigue: emerging evidence and approaches to management: a scientific statement for healthcare professionals from the American Heart Association.
,42- Wu S.
- Barugh A.
- Macleod M.
- Mead G.
Psychological associations of poststroke fatigue: a systematic review and meta-analysis.
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- Metha Z.
- Rothwell P.M.
A population-based study of the prevalence of fatigue after transient ischemic attack and minor stroke.
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Experience of severe fatigue long after stroke and its relation to depressive symptoms and disease characteristics.
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Medications that are commonly prescribed in patients with stroke, including sedatives and antidepressants, may cause fatigue.
4- Hinkle J.L.
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Poststroke fatigue: emerging evidence and approaches to management: a scientific statement for healthcare professionals from the American Heart Association.
,30- Ponchel A.
- Bombois S.
- Bordet R.
- Hénon H.
Factors associated with poststroke fatigue: a systematic review.
Pain also impairs patient function and may contribute to poststroke fatigue.
3- Wu S.
- Mead G.
- Macleod M.
- Chalder T.
Model of understanding fatigue after stroke.
,4- Hinkle J.L.
- Becker K.J.
- Kim J.S.
- et al.
Poststroke fatigue: emerging evidence and approaches to management: a scientific statement for healthcare professionals from the American Heart Association.
,30- Ponchel A.
- Bombois S.
- Bordet R.
- Hénon H.
Factors associated with poststroke fatigue: a systematic review.
Therefore, medications taken and pain experience can potentially act to confound the relationship between poststroke fatigue and ADL independence. Second, the persistence of poststroke fatigue over time is well known.
3- Wu S.
- Mead G.
- Macleod M.
- Chalder T.
Model of understanding fatigue after stroke.
,6- Pihlaja R.
- Uimonen J.
- Mustanoja S.
- Tatlisumak T.
- Poutiainen E.
Post-stroke fatigue is associated with impaired processing speed and memory functions in first-ever stroke patients.
,27- Schepers V.P.
- Visser-Meily A.M.
- Ketelaar M.
- Lindeman E.
Poststroke fatigue: course and its relation to personal and stroke-related factors.
,28- Duncan F.
- Greig C.
- Lewis S.
- et al.
Clinically significant fatigue after stroke: a longitudinal cohort study.
The present study was designed to focus on associations between poststroke fatigue at admission and levels of independence in ADL at discharge. Therefore, poststroke fatigue at the time of discharge was not examined. However, future studies using multiple assessments of fatigue during the course of rehabilitation will reveal the effects of fatigue on the final ADL outcome more thoroughly. Finally, participants with stroke in this study were recruited from a single facility. Further multicenter studies are needed to increase the generalizability of our findings.
Article info
Publication history
Published online: November 05, 2020
Footnotes
Supported by the Funds for a Grant-in-Aid for Young Scientists, Tokyo, Japan (to Kazuaki Oyake; grant no. 18K17730). The funding source had no involvement with the study design, collection, analysis, and interpretation of data, writing of the report, or the decision to submit the article for publication.
Disclosures: none.
Copyright
© 2020 by the American Congress of Rehabilitation Medicine. Published by Elsevier Inc.