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Independent effect of fatigue on health-related quality of life in patients with idiopathic Parkinson’s disease

Abstract

Nonmotor symptoms (NMS) of idiopathic Parkinson’s disease (IPD), specifically fatigue, depression and sleep disturbances, are important contributors for worse quality of life and poor patient outcomes. The aim of this research is to determine the relationship between fatigue and other NMS and the independent effect of fatigue on health-related quality of life (HRQoL) in patients with IPD. 86 IPD patients and 85 healthy individuals were included in our study. Participants were evaluated by their answers to the Beck Depression Inventory, Fatigue Severity Scale, Epworth Sleepiness Scale and Parkinson’s Disease Questionnaire-39. Hoehn–Yahr stage, disease duration, medications and demographical characteristics were also noted. ROC analysis was used to determine the cutoff point for HRQoL. Nonparametric Spearman correlation analysis was used for determining the relationship between variables. Independent factors which affect HRQoL were detected by multiple forward stepwise logistic regression analysis. NMS were associated with each other and with HRQoL when they act concomitantly (p < 0.001). Of these three frequent NMS, depression (p < 0.05) and fatigue (p < 0.001) had independent worsening effect on HRQoL, whereas sleep disturbances did not (p > 0.05). The stage of IPD and levodopa–entacapone treatment had independent effects on HRQoL too (p < 0.05). Fatigue was found as the most important factor which affects HRQoL among all investigated NMS. So, it is important to ask about fatigue in routine controls of IPD patients and try to treat it for improving life quality.

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No funding source was used during the research. No other people than researchers participated in this study.

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Correspondence to Vasfiye Burcu Dogan.

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Dogan, V.B., Koksal, A., Dirican, A. et al. Independent effect of fatigue on health-related quality of life in patients with idiopathic Parkinson’s disease. Neurol Sci 36, 2221–2226 (2015). https://doi.org/10.1007/s10072-015-2340-9

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  • DOI: https://doi.org/10.1007/s10072-015-2340-9

Keywords

  • Idiopathic Parkinson’s disease
  • Nonmotor symptoms
  • Fatigue
  • Fatigue Severity Scale
  • PDQ-39
  • Health-related quality of life