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Subjective health perception prioritizes psychological well-being over physical function in advanced ALS: A multigroup structural equation modeling analysis

  • Brittany Lapin
    Correspondence
    Corresponding author at: Department of Quantitative Health Sciences, Cleveland Clinic, 9500 Euclid Avenue, JJN5, Cleveland, OH 44195, United States of America.
    Affiliations
    Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States of America

    Center for Outcomes Research and Evaluation, Neurological Institute, Cleveland Clinic, Cleveland, OH, United States of America
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  • Kedar Mate
    Affiliations
    Center for Neurological Restoration, Neurological Institute, Cleveland Clinic, Cleveland, OH, United States of America
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  • Yadi Li
    Affiliations
    Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States of America

    Center for Outcomes Research and Evaluation, Neurological Institute, Cleveland Clinic, Cleveland, OH, United States of America
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  • Nimish Thakore
    Affiliations
    Neuromuscular Center, Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, United States of America
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Published:September 30, 2022DOI:https://doi.org/10.1016/j.jns.2022.120442

      Abstract

      Background

      Despite declining physical function, individuals with ALS report relative preservation of overall health perception, or health-related quality of life (HRQoL). This paradoxical finding is attributed to psychological adaptation to deficits.

      Objective

      The aim of this cross-sectional study was to examine reprioritization of factors that determine HRQoL with disease progression.

      Methods

      As standard care, patients with ALS self-reported ALSFRS-R (measure of bulbar, motor, and respiratory function), PHQ-9 (measure of depression), and EQ-5D-3L (utility index that includes a visual analog scale asking about health perception [EQ-VAS]). ALS was staged by the FT9 method and classified into early (stages 0–2) and late (stages 3–4) disease. Multigroup structural equation modeling was used to evaluate weights of physical (PHY) and psychological well-being (PSY) for early and late disease, on EQ-VAS (as a measure of overall HRQoL).

      Results

      There were 578 patients (mean age 61.5 ± 11.9, 59% male) with ALS: 423 (73%) early and 155 (27%) late disease. A measurement model was established with good model fit (RMSEA = 0.076, CFI = 0.943, SRMR = 0.045). In adjusted models, standardized weights of PHY and PSY on HRQoL in early disease were 0.34 (standard error = 0.06) and 0.24 (0.06) respectively, whereas for late disease they were 0.39 (0.07) and 0.42 (0.07). Importantly, PHY and PSY were significantly correlated in early but not in late disease.

      Conclusions

      Our study found health perception is more representative of psychological well-being and less representative of physical function across the disease progression. Greater allocation for psychological health would be the most effective strategy to maximize subjective health status as ALS advances.

      Keywords

      Abbreviations:

      ALS (Amyotrophic lateral sclerosis), ALSFRS-R (Revised ALS Functional Rating Score), CFI (Comparative fit index), EQ-VAS (EQ-5D Visual Analog Scale, and overall measure of health perception), HRQoL (Health-related quality of life), RMSEA (Root mean square error of approximation), PHY (Latent variable indicating psychological health), PHY (Latent variable indicating physical health), SEM (Structural equation modeling), SRMR (Standardized root mean square residual), QoL (Quality of life)
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