Abstract
BackgroundFatigue is widespread in the population and a common complaint in primary care. Little is known about prevalence of fatigue in the population and its predictors.We aimed to describe the pattern of fatigue in the general population and to explore the associations with age, sex, socioeconomic status, self-reported physical activity, sitting time and self-rated health.MethodsOne thousand, five hundred and fifty-seven out of 2500 invited subjects in the Northern Sweden MONICA Study 2014, aged 25–74 years, filled out the Multidimensional Fatigue Inventory (MFI-20), consisting of four subscales: General fatigue (GF), Physical fatigue (PF), Reduced activity (RA) and Mental fatigue (MF). Questions regarding age, sex, socioeconomic status, physical activity, sitting time and self-rated health were also included.ResultsHigher age correlated significantly with lower fatigue scores for the GF and MF subscales. Women had higher fatigue scores than men on all subscales (p < 0.05). Among men, higher socioeconomic status was related to lower fatigue for the GF, PF and RA subscales (age adjusted p < 0.05). Among women, higher socioeconomic status was related to lower fatigue for the PF and MF subscales (age adjusted p < 0.05). Higher physical activity was connected to lower levels of fatigue for all subscales (age and sex adjusted p < 0.001) except for MF. Longer time spent sitting was also related to more fatigue on all subscales (age and sex adjusted p < 0.005) except for MF. Better self-rated health was strongly associated with lower fatigue for all subscales (age and sex adjusted p < 0.001).ConclusionOlder, highly educated, physically active men, with little sedentary behavior are generally the least fatigued. Self-rated health is strongly related to fatigue. Interventions increasing physical exercise and reducing sedentary behavior may be important to help patients with fatigue and should be investigated in prospective studies.
Highlights
Fatigue is widespread in the population and a common complaint in primary care
MFI-20 MFI-20 consists of five subscales regarding fatigue: General fatigue (GF), Physical fatigue (PF), Reduced motivation (RM), Reduced activity (RA) and Mental fatigue (MF) [13]
A recent study reports that the subscale RM is considered to be in the range of weak scalability and the results from this subscale should be interpreted with caution [12]
Summary
Fatigue is widespread in the population and a common complaint in primary care. Little is known about prevalence of fatigue in the population and its predictors. We aimed to describe the pattern of fatigue in the general population and to explore the associations with age, sex, socioeconomic status, self-reported physical activity, sitting time and self-rated health. Fatigue is widespread in the population [1,2,3,4], it is frequently reported in primary care [5, 6], and it is commonly unexplained by underlying disease [6, 7]. A systematic review of instruments for measuring fatigue has proposed one definition: “An unpleasant physical, cognitive and emotional symptom described as a tiredness not relieved by common strategies that restore energy.
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