Table 4. Correlation of hCGβ levels with AFP and CgA levels.

			Ki-67 (MIB-1)	AFP	CgA	Survival in months
Spearman's ρ	hCGβ	Correlation coefficient	0.012	0.634 (**)	0.291 (*)	−0.229
		Significant (two-tailed)	0.931	0.000	0.019	0.074

AFP=α-fetoprotein; hCGβ=human chorionic gonadotrophin-β ; NET=neuroendocrine tumour.

There is also a trend towards a statistically significant correlation between hCGβ levels and survival, but clear absence of linkage between hCGβ levels and Ki-67 score.

^**Correlation is significant at the 0.01 level (two-tailed).

^*Correlation is significant at the 0.05 level (two-tailed).