Figure 2

PSA relapse free survival for periostin in training and test cohort. a) In the training cohort higher stromal periostin expression was a significant prognosticator for shortened PSA relapse free survival (p = 0.045). The periostin low group consisted of 70 patients of which 29 had a PSA relapse. In the periostin high group 14 of the 23 patients had a PSA relapse. b) In the test cohort the curve of those patients with higher stromal periostin expression remained slightly below that of the patients with lower stromal periostin expression (p = 0.373). In the test cohort the periostin low group consisted of 152 patients. Forty-six patients had a PSA relapse (periostin high group: 22 of the 59 patients with PSA relapse).