PDE4 and Epac1 Synergistically Promote Rectal Carcinoma via the cAMP Pathway

Table 4

Correlation between PDE4 and Cx43 protein levels in rectal cancer.

PDE4	Cx43
	−	+−	+	++	+++
−	6	3	2	0	0	0.367	0.014
+−	1	5	1	0	0
+	2	7	7	0	0
++	2	2	2	2	1
+++	0	1	0	0	0

Note: is the spearman rank correlation coefficient.