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Background/Objectives Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease with a poor prognosis. Three prominent prognostic staging systems have been validated thus far; however, these incorporate limited patient phenotypic features. Therefore, we aimed to develop a simple tool to stage patients with regards to their phenotypic features in 3 key regions – Bulbar, Cervical, and Lumbar.Methods A 3-stage system was developed using patient phenotypes with Stage-1 representing early, and Stage-3 representing advanced disease. Parameters used to define the system included Upper Motor Neuron (UMN) and Lower Motor Neuron (LMN) features, the functional vital capacity (FVC), and spread of the disease within a specified time-period. A computer application, with the staging system embedded, was developed for the data analysis.Results Phenotypic data were analysed from 33 patients attending a fortnightly ALS clinic over 18 months. Stages were generated using the computer application. Total mortality in the cohort was 9, with all patients at a Stage-3 at death. 7 out of the 9 patients had progressed to a higher stage during their visits. The patients who had progressed faster had a shorter time to mortality as well. There was no regression of stages observed for any of the patients.Conclusions Our comprehensive system incorporates key prognostic characteristics that have not been used previously. Furthermore, utilisation of an application simplifies staging. Although there was no regression of stages, a larger sample size is required to confirm this. This system may have utility in potentially larger research data bases and drug trials.