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

Table 2 Diagnostic value in clinical staging

Diagnostic method		Gold standard (n)		Sensitivity (%)	Specificity (%)	Accuracy (%)	Positive predictive value (%)	Negative predictive value (%)
		T1-T2	T3-T4
Magnetic resonance T2WI	T1-T2	25	12	69.44	70.00	69.74	67.57	71.79
	T3-T4	11	28	72.22	72.50	72.37	70.27	74.36
Diffusion-weighted imaging	T1-T2	26	11
	T3-T4	10	29	94.44	95.00	94.74	94.44	95.00
Combined	T1-T2	34	2
	T3-T4	2	38
χ2 value				8.065	9.196	17.258	9.062	8.180
P value				0.018	0.010	< 0.001	0.011	0.017

T2WI: T2-weighted imaging.