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Relationship between the MIC, VC difference (MIC-VC), and the difference between PCFmic and UPCF (PCFmic-UPCF). The MIC-VC correlated significantly with the PCFmic-UPCF (r=0.572; p < 0.01). MIC, maximum insufflation capacity; VC, vital capacity; PCFmic, peak cough flow under maximum insufflation capacity; UPCF, unassisted peak cough flow.
