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To maximise its potential, several challenges remain. These include the sensitivity to different instrument configurations, translation across preclinical\/human tissues and the development of multivariate analytics that can derive interpretable spectral outputs for disease identification. Nonnegative matrix factorisation (NMF) can extract features from high\u2010dimensional data sets and the nonnegative constraint results in physically realistic outputs. In this study, we have undertaken NMF on Raman spectra of muscle obtained from different clinical and preclinical settings. First, we obtained and combined Raman spectra from human patients with mitochondrial disease and healthy volunteers, using both a commercial microscope and in\u2010house fibre optic probe. NMF was applied across all data, and spectral patterns common to both equipment configurations were identified. Linear discriminant models utilising these patterns were able to accurately classify disease states (accuracy 70.2\u201384.5%). Next, we applied NMF to spectra obtained from the <jats:italic>mdx<\/jats:italic> mouse model of a Duchenne muscular dystrophy and patients with dystrophic muscle conditions. Spectral fingerprints common to mouse\/human were obtained and able to accurately identify disease (accuracy 79.5\u201398.8%). We conclude that NMF can be used to analyse Raman data across different equipment configurations and the preclinical\/clinical divide. Thus, the application of NMF decomposition methods could enhance the potential of Raman spectroscopy for the study of fatal neuromuscular diseases.<\/jats:p>","DOI":"10.1002\/jrs.6480","type":"journal-article","created":{"date-parts":[[2022,12,1]],"date-time":"2022-12-01T10:19:24Z","timestamp":1669889964000},"page":"258-268","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Non\u2010negative matrix factorisation of Raman spectra finds common patterns relating to neuromuscular disease across differing equipment configurations, preclinical models and human tissue"],"prefix":"10.1002","volume":"54","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8391-9749","authenticated-orcid":false,"given":"James J. 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