Table 1.

Inter-observer consistency and comparisons of the absolute values of the parameters

	ICC§ (95% confidence interval)	Tumor of T1 stage NPC	Mucosa of healthy control	P	z	AUC (95% confidence interval)
BF (mL/min/100 g)	0.994 (0.991–0.996)	81.85 ± 32.46	22.89 ± 6.84	<0.001	7.309	0.996 (0.944–1.000)
ADC (×10−3 mm2/s)	0.946 (0.915–0.966)	0.81 ± 0.12	1.08 ± 0.19	<0.001	−5.808	0.895 (0.803–0.953)
D (×10−3 mm2/s)	0.893 (0.831–0.932)	0.61 ± 0.10	0.83 ± 0.15	<0.001	−6.226	0.921 (0.836–0.970)
D* (×10−3 mm2/s)	0.894 (0.832–0.933)	26.21 ± 19.09	28.49 ± 18.50	0.341	−0.951	–
f	0.900 (0.842–0.936)	0.27 ± 0.11	0.34 ± 0.11	<0.001	−3.525	0.742 (0.628–0.835)

^§ ICC is the abbreviation of Intra-class correlation

All the values were calculated as the mean value of the measurements by two observers