Diagnostic value of diffusion-weighted MRI using apparent diffusion coefficient (ADC) in evaluation of median nerve in carpal tunnel syndrome

Egyptian Journal of Radiology and Nuclear Medicine

Table 3 Statistical analysis of diagnostic accuracy of diffusion-weighted MRI versus conventional MRI in differentiation between patients and control groups

		Patients N = 40 wrists		Control N = 20 wrists		p value	Diagnostic performance
		N	%	N	%	p value	Sens.%	Spec. %	PPV	NPV	Accuracy %
Conventional MRI	No	30	75.0	20	100.0	0.140	25.0	100.0	100.0	57.14	62.50
Conventional MRI	Yes	10	25.0	0	0.0	0.140	25.0	100.0	100.0	57.14	62.50
DWI-MRI	No	2	5.0	20	100	< 0.001*	95.0	100.0	100.0	95.24	97.50
DWI-MRI	Yes	38	95.0	0	0.0	< 0.001*	95.0	100.0	100.0	95.24	97.50
Nerve conduction study	No	0	0	20	100	< 0.001*	100.0	100.0	100.0	100.0	100.0
Nerve conduction study	Yes	40	100.0	0	0.0	< 0.001*	100.0	100.0	100.0	100.0	100.0

Sens. sensitivity, Spec. specificity, PPV positive predictive value, NPV negative predictive value
p value: probability
^*significant p value (< 0.05)