Document Classification

Section Type: RESULTS

Text: In the final regression tree, three risk groups could be identified : low risk group (n = 1111) with a median survival of 15 months for patients with ECOG 0/1 and only one tumour site ; intermediate risk group (n = 904) with a median survival of 10. 7 months for patients with ECOG 0/1 and more than one tumour site and alkaline phosphatase < 300 U/l or patients with ECOG > 1, WBC count < 10 x 10 (9) / l and only one tumour site ; high risk group (n = 534) with a median survival of 6. 1 months for patients with ECOG 0/1 and more than one tumour site and alkaline phosphatase of > or = 300 U/l or patients with ECOG > 1 and more than one tumour site or WBC count > 10 x 10 (9) / l.