The Egyptian Journal of Bronchology

Table 4 Correlation between FEV1 with PaO₂, CRP, 6MWT distance, and mMRC score among cases

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

	FEV1
	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
PaO₂	0.013	0.981	− 0.097	0.854	− 0.819	0.046^*	0.792	0.060	0.665	< 0.001^*
CRP	0.844	0.035^*	0.216	0.681	− 0.794	0.059	0.784	0.065	− 0.128	0.552
6MWT distance	− 0.119	0.822	0.546	0.262	− 0.707	0.116	− 0.375	0.464	0.193	0.367
mMRC score	0.000	1.000	− 0.555	0.252	0.736	0.095	0.144	0.786	− 0.317	0.140

r Pearson coefficient
^*Statistically significant at p ≤ 0.05

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