The Egyptian Journal of Bronchology

Table 2 Correlation between average RFCSA and different parameters among studied cases

From: Correlation between rectus femoris muscle cross-sectional area and the severity of airflow limitation in COPD patients

	Average RF_CSA
	Mild (n = 6)		Moderate (n = 6)		Severe (n = 6)		Very severe (n = 6)		Total patients (n = 24)
	R	P	R	P	R	P	R	P	R	p
Age	0.170	0.748	− 0.381	0.456	0.663	0.151	− 0.821	0.045^*	− 0.320	0.128
PYI	0.712	0.113	0.071	0.894	− 0.215	0.682	− 0.571	0.237	− 0.353	0.091
mMRC score	− 0.824	0.087	− 0.905	0.013^*	− 0.827	0.042^*	− 0.907	0.013^*	− 0.864^*	< 0.001^*
PaO₂	− 0.147	0.780	0.272	0.603	0.191	0.717	− 0.153	0.772	0.217	0.309
6MWT distance	0.593	0.215	0.782	0.066	0.782	0.066	0.864	0.027^*	0.795^*	< 0.001^*
Heart rate	0.578	0.230	− 0.431	0.394	− 0.693	0.127	0.187	0.723	− 0.285	0.178
FEV1	− 0.210	0.690	0.601	0.207	− 0.402	0.429	− 0.459	0.360	0.165	0.442
BMI	0.752	0.085	0.111	0.834	0.494	0.319	0.243	0.643	0.218	0.305
QMVC	0.955	0.003^*	0.854	0.031^*	0.784	0.065	0.973	0.001^*	0.881^*	< 0.001^*
CRP	− 0.180	0.732	0.650	0.162	0.713	0.112	− 0.625	0.184	− 0.169	0.431

r Pearson coefficient
^*Statistically significant at p ≤ 0.05

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