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Table 4 Multivariate analysis* (Cox model) in 201 irradiated patients

From: Prognostic factors in solitary plasmacytoma of the bone: a multicenter Rare Cancer Network study

Covariable OS   DFS   LC   MM   
  RR p-value RR p-value RR p-value RR p-value comment
Age (years) 0.59 <0.00001 0.79 0.02 - - 0.78 0.01 ≤ 60 years better
Localization (vertebra vs.other) - - - - 0.63 0.04 - - vertebra better
Tumor size (cm) (<5 vs. ≥5) 0.56 0.0007 - - - - - - <5 cm better
  1. *including age, gender, localization, tumor size, IgM subtype, type of treatment, and biologically equivalent radiation dose.
  2. OS: overall survival; DFS: disease-free survival; LC: local control; MM: progression to multiple myeloma