Analysis of motor and respiratory function in Duchenne muscular dystrophy patients

•Duchenne muscular dystrophy patients presented motor and respiratory deterioration.•Non-ambulatory condition was associated with worse motor function measure and spirometry.•Deterioration of motor and respiratory function showed correlation between each other.•The assessments should be performed on a routine basis. Duchenne muscular dystrophy(DMD) shows motor and respiratory impairment. 19 DMD patients (DMDG) (nine ambulatory and 10 non-ambulatory) were evaluated through motor function measure (MFM), 6-minute walk test (6MWT), respiratory muscle strength, cough peak flow, spirometry and volumetric capnography (VCap) tools. Control group that performed spirometry and VCap (CG1-n = 17) were different from those that performed the 6MWT (CG2-n = 8). The follow tools were assessed (p