Table 3– Structural characteristics of the vastus lateralis muscle in severe chronic obstructive pulmonary disease (COPD) patients and healthy controls
Control subjectsNonwasted severe COPD patientsMuscle-wasted severe COPD patients
Type I fibres %30±529±723±6*,#
Type II fibres %70±571±777±6*,#
Cross-sectional area μm2
 Type I fibres2581±2782452±4252243±514
 Type II fibres2909±5402880±3612306±533*,#
Normal muscle %98.5±0.497.5±0.7**97.5±0.9*
Abnormal muscle %1.5±0.42.5±0.7**2.5±0.9*
  • Data are presented as mean±sd. *: p≤0.05; **: p≤0.01, between any of the groups of severe COPD patients and controls; #: p≤0.05, between muscle-wasted and nonwasted COPD patients.