Hazard rate for distant metastasis in different sites. Distant metastases were categorised as bone, viscera and soft tissue recurrences. Soft tissue metastases also included the supra-clavicular lymph node recurrences. Because of the limited number of events to a single visceral site, recurrences to lung, liver or CNS were merged to obtain a more suitable collection of cases, representative of the visceral recurrence. Vertical lines represent point-wise confidence intervals for the model estimated hazards, according to standard asymptotic theory.