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

Table 3 Diagnostic value of doppler ultrasonography for different arterial branches in diabetic lower extremity arterial disease

Degree of stenosis	Arterial branch classification	DUS diagnosis	DSA diagnosis		Kappa	Sensitivity (%)	Specificity (%)	Accuracy (%)
			Moderate/severe	Non-moderate/non-severe
Moderate stenosis	Grade 1	Moderate	44	8	0.780	86.3	92.1	90.1
		Non-moderate	7	93
	Grade 2	Moderate	45	9	0.755	84.9	90.9	88.8
		Non-moderate	8	90
	Grade 3	Moderate	43	9	0.806	91.5	91.4	91.4
		Non-moderate	4	96
Severe stenosis or occlusion	Grade 1	Severe	18	23	0.484	82.6	82.2	82.2
		Non-severe	5	106
	Grade 2	Severe	39	10	0.699	79.6	90.3	86.8
		Non-severe	10	93
	Grade 3	Severe	14	18	0.449	70.0	86.4	84.2
		Non-severe	6	114

DUS: Doppler ultrasonography; DSA: Digital subtraction angiography.