Fig. 2

Inter-examiner and intra-examiner concordance analysis of rectus femoris and patellar tendon in COPD patients. (A) Inter-examiner concordance analysis in rectus femoris in COPD patients. (B) Intra-examiner concordance analysis in rectus femoris in COPD patients. (C) Inter-examiner concordance analysis in patellar tendon in COPD patients. (D) Intra-examiner concordance analysis in patellar tendon in COPD patients.