T2 magnetic resonance imaging combined with diffusion-weighted imaging for colon cancer lymph nodes

Table 3 Diagnostic value in lymph node staging

Diagnostic method		Gold standard (n)		Sensitivity (%)	Specificity (%)	Accuracy (%)	Positive predictive value (%)	Negative predictive value (%)
Lymph node metastasis		Yes	No
Magnetic resonance T2WI	Yes	29	12	74.36	67.57	71.05	70.73	71.43
	No	10	25	71.79	72.97	72.37	73.68	71.05
Diffusion-weighted imaging	Yes	28	10
	No	11	27	94.87	94.59	94.74	94.87	94.59
Combined	Yes	37	2
	No	2	35
χ2 value				7.901	8.931	16.546	8.425	8.105
P value				0.019	0.011	< 0.001	0.015	0.017

T2WI: T2-weighted imaging.