Figure 1

Relative DDR2 expression in lung SCC tissues and its clinical significance. (A) qRT–PCR analysis of the relative DDR2 expression in lung SCC tissues (n = 54) and in paired adjacent normal tissues (n = 54). DDR2 expression was normalized to GAPDH expression. The data are presented as a fold-change in the tumor tissue relative to the normal tissue. (B) DDR2 expression was relatively higher in patients with lymph node metastasis. (C) DDR2 expression was relatively higher in patients with an advanced clinical stage than those with an early clinical stage. (D) There was no significantly difference in survival times between patients with high DDR2 expression and those with low DDR2 expression levels *P < 0.05, **P < 0.01.