C-reactive protein may be a prognostic factor for the whole gastroenteropancreatic neuroendocrine tumor group

Table 3 Correlation analysis of tumor properties and C-reactive protein level

Correlation coefficients (r)	Tumor diameter (cm)	Tumor stage	Tumor grade (mitotic index)	Tumor grade (Ki-67 level)	Tumor grade (determined)	CRP (mg/L)
Tumor diameter (cm)	-
Tumor stage	0.76b	-
Tumor grade (mitotic count)	0.37b	0.39b	-
Tumor grade (Ki-67 level)	0.59b	0.55b	0.75b	-
Tumor grade (determined)	0.57b	0.53b	0.78b	0.99b	-
CRP (mg/L)	0.25a	0.26a	0.22	0.17	0.17	-

^aP < 0.05.

^bP < 0.001.

CRP: C-reactive protein.