The Egyptian Journal of Bronchology

Table 3 Correlation between QMVC and different parameters among cases

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

	QMVC (kg)
	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	0.384	0.452	− 0.559	0.248	0.274	0.599	− 0.928	0.008^*	− 0.520^*	0.009^*
PYI	0.648	0.164	− 0.409	0.421	0.183	0.729	− 0.583	0.224	− 0.403	0.051
mMRC score	− 0.850	0.068	− 0.910	0.012^*	− 0.930	0.007^*	− 0.960	0.002^*	− 0.896^*	< 0.001^*
PaO₂	− 0.037	0.944	0.435	0.389	0.541	0.268	− 0.173	0.743	0.263	0.215
6MWT distance	0.628	0.182	0.880	0.021^*	0.867	0.025^*	0.950	0.004^*	0.899^*	< 0.001^*
Heart rate	0.689	0.130	− 0.612	0.197	− 0.753	0.084	0.078	0.883	− 0.362	0.082
FEV1	0.048	0.928	0.250	0.633	− 0.473	0.343	− 0.446	0.375	0.158	0.460
BMI	0.551	0.257	− 0.029	0.957	0.391	0.443	0.112	0.832	0.133	0.537
CRP	− 0.009	0.986	0.666	0.149	0.806	0.053	− 0.536	0.273	− 0.071	0.741

r Pearson coefficient
^*Statistically significant at p ≤ 0.05

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