Noninvasive prediction of Ki-67 expression in pancreatic cancer via contrast-enhanced ultrasound quantitative parameters: A diagnostic model study

Table 8 Analysis of the correlation between enhancement modes and Ki-67 expression levels, n (%)

	Ki-67 < 50%	Ki-67 ≥ 50%	χ² value	P value
I	1 (3.45)	2 (8)	5.246	0.245
II	18 (62.07)	8 (32)
III	8 (27.59)	10 (40)
IV	2 (6.89)	1 (4)
V	0 (0)	0 (0)
VI	0 (0)	4 (16)

P > 0.05.