Cytokinetics presents data at the Virtual 33rd International Symposium on ALS/MND (37.04)
In a previously presented post-hoc analysis of disease progression in FORTITUDE-ALS, patients were grouped into tertiles according to their pre-study rate of decline in the ALS Functional Rating Scale Revised (ALSFRS-R) total score. The largest treatment effect from reldesemtiv was observed in the intermediate and fast progressing tertiles. Most patients in these two tertiles had experienced symptoms for =24 months and had a baseline ALSFRS-R total score =44 (referred to as the 24/44 criteria).
In this analysis, the ENCALS survival model was used to calculate a predicted survival risk score for all participants in FORTITUDE-ALS. The ENCALS survival model calculates the risk score based on several factors, including age at onset, onset site, cognition, vital capacity, El Escorial classification, diagnostic delay, C9orf72 expansion repeat, and decline in ALSFRS-R total score.