Comparison of three diagnostic imaging modalities for use in diabetic inferior arterial lesions

Table 4 Value of contrast-enhanced magnetic resonance angiography in diagnosing diabetic lower extremity arterial disease of arterial branches of different grades

Degree of stenosis	Arterial branch classification	CE-MRA diagnosis	DSA diagnosis		Kappa	Sensitivity (%)	Specificity (%)	Accuracy (%)
			Moderate/severe	Non-moderate/non-severe
Moderate stenosis	Grade 1	Moderate	46	10	0.784	90.2	90.1	90.1
		Non-moderate	5	91
	Grade 2	Moderate	48	8	0.814	90.6	91.9	91.4
		Non-moderate	5	91
	Grade 3	Moderate	44	8	0.835	93.6	92.4	92.8
		Non-moderate	3	97
Severe stenosis or occlusion	Grade 1	Severe	19	9	0.694	82.6	93.0	91.4
		Non-severe	4	120
	Grade 2	Severe	42	10	0.748	85.7	90.3	88.8
		Non-severe	7	93
	Grade 3	Severe	16	12	0.606	80.0	90.9	89.5
		Non-severe	4	120

CE-MRA: Contrast-enhanced magnetic resonance angiography; DSA: Digital subtraction angiography.