Fig. 2. Follow-up analysis of forced vital capacity percent predicted (FVC% predicted) and minimal inspiratory pressure to minimal expiratory pressure (MIP:MEP) ratio in the cervical-onset amyotrophic lateral sclerosis (C-ALS) patients. Decreased FVC% predicted was found on follow-up. Four patients showed a change in the MIP:MEP ratio to above or below 1. Fourteen patients (77.8%) showed a constant MIP:MEP ratio above or below 1 from the first to the last examination.
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