1. Amyotrophic lateral sclerosis-specific quality of life-short form (ALSSQOL-SF): A brief, reliable, and valid version of the ALSSQOL-R
- Author
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Zachary Simmons, Kevin B. Boylan, James B. Caress, Leo McCluskey, Helen E. Stephens, Lauren Elman, Stephen A. Goutman, James A. Russell, Stephanie H. Felgoise, Michael D. Weiss, Ezgi Tiryaki, Lora Clawson, Richard A. Feinberg, and Paul E. Barkhaus
- Subjects
Adult ,Male ,medicine.medical_specialty ,Psychometrics ,Physiology ,Cross-sectional study ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,Quality of life ,Surveys and Questionnaires ,Physiology (medical) ,Item response theory ,Humans ,Medicine ,Amyotrophic lateral sclerosis ,Aged ,Retrospective Studies ,Aged, 80 and over ,business.industry ,Amyotrophic Lateral Sclerosis ,Reproducibility of Results ,Construct validity ,Middle Aged ,medicine.disease ,Confirmatory factor analysis ,Cross-Sectional Studies ,030220 oncology & carcinogenesis ,Quality of Life ,Physical therapy ,Female ,Neurology (clinical) ,business ,Psychosocial ,030217 neurology & neurosurgery - Abstract
Introduction The Amyotrophic Lateral Sclerosis (ALS)-Specific Quality of Life instrument and its revised version (ALSSQOL and ALSSQOL-R) have strong psychometric properties, and have demonstrated research and clinical utility. In this study we aimed to develop a short form (ALSSQOL-SF) suitable for limited clinic time and patient stamina. Methods The ALSSQOL-SF was created using Item Response Theory and confirmatory factor analysis on 389 patients. A cross-validation sample of 162 patients assessed convergent, divergent, and construct validity of the ALSSQOL-SF compared with psychosocial and physical functioning measures. Results The ALSSQOL-SF consisted of 20 items. Compared with the ALSSQOL-R, optimal precision was retained, and completion time was reduced from 15-25 minutes to 2-4 minutes. Psychometric properties for the ALSSQOL-SF and its subscales were strong. Discussion The ALSSQOL-SF is a disease-specific global QOL instrument that has a short administration time suitable for clinical use, and can provide clinically useful, valid information about persons with ALS. Muscle Nerve 58: 646-654, 2018.
- Published
- 2018
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