Table 3.

Correlation coefficients (r) between blood Cd and Pb with miRNA-21 expression in cancerous tissues.

	TCC		SCC
	Cd blood	Pb blood	Cd blood	Pb blood
miRNA-21	0.584 (<0.001)	0.659 (<0.001)	0.363 (<0.01)	0.531 (<0.001)

All values represent r (p values).