Background: Clinician-assessed Expanded Disease Status Scale (EDSS) is gold standard in clinical investigations but normally unavailable in population-based, patient-centred MS-studies. Our objective was to develop a self-reported gait measure reflecting EDSS-categories. Methods: We developed the self-reported disability status scale (SRDSS) with three categories (≤3.5, 4–6.5, ≥7) based on three mobility-related questions. The SRDSS was determined for 173 persons with MS and validated against clinical EDSS to calculate sensitivity and specificity. Results: Accuracy was 88.4% (153 correctly classified) and weighted kappa 0.73 (0.62–0.84). Sensitivity/specificity-pairs were 94.5%/77.8%, 69.0%/94.7% and 100%/98.2% for SRDSS ≤3.5, 4–6.5 and ≥7, respectively. Conclusions: Self-reported SRDSS approximates EDSS-categories well and fosters comparability between clinical and population-based studies.
Development and validation of the self-reported disability status scale (SRDSS) to estimate EDSS-categories / Kaufmann, M., Salmen, A., Barin, L., Puhan, M.A., Calabrese, P., Kamm, C.P., Gobbi, C., Kuhle, J., Manjaly, Z., Ajdacic-Gross, V., Schafroth, S., Bottignole, B., Ammann, S., Zecca, C., D'Souza, M., Von Wyl, V.. - In: MULTIPLE SCLEROSIS AND RELATED DISORDERS. - ISSN 2211-0348. - 42:(2020), pp. 1021481-1021484. [10.1016/j.msard.2020.102148]
Development and validation of the self-reported disability status scale (SRDSS) to estimate EDSS-categories
Barin, Laura;
2020-01-01
Abstract
Background: Clinician-assessed Expanded Disease Status Scale (EDSS) is gold standard in clinical investigations but normally unavailable in population-based, patient-centred MS-studies. Our objective was to develop a self-reported gait measure reflecting EDSS-categories. Methods: We developed the self-reported disability status scale (SRDSS) with three categories (≤3.5, 4–6.5, ≥7) based on three mobility-related questions. The SRDSS was determined for 173 persons with MS and validated against clinical EDSS to calculate sensitivity and specificity. Results: Accuracy was 88.4% (153 correctly classified) and weighted kappa 0.73 (0.62–0.84). Sensitivity/specificity-pairs were 94.5%/77.8%, 69.0%/94.7% and 100%/98.2% for SRDSS ≤3.5, 4–6.5 and ≥7, respectively. Conclusions: Self-reported SRDSS approximates EDSS-categories well and fosters comparability between clinical and population-based studies.| File | Dimensione | Formato | |
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