Table 3.

Apparent diffusion coefficient values of autoimmune pancreatitis lesions compared with those of surrounding pancreatic tissue¹

	AIP lesions ADC	Surrounding parenchyma ADC	Wilcoxon signed-rank test
	Values (n = 56) (× 10-3 mm2/s)	Values (n = 56) (× 10-3 mm2/s)	Z value	P value
Mean	0.96	1.15	-5.11	0.001
SD	0.14	0.15
Median	0.96	1.16
Minimum	0.68	0.89
Maximum	1.26	1.40

¹Apparent diffusion coefficient values in autoimmune pancreatitis lesions were lower (0.96 ± 0.14) compared with those in the surrounding pancreatic parenchyma (1.15 ± 0.15), Wilcoxon signed-rank test demonstrated this difference to be statistically significant (P = 0.001). ADC: Apparent diffusion coefficient; AIP: Autoimmune pancreatitis; SD: Standard deviation.