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Table 1 Distributions of the factors investigated for potential associations with survival

From: Prognostic factors and a new scoring system for survival of patients irradiated for bone metastases

 N patients (%)
Age
  ≤ 60 years132 (30)
 61–70 years131 (29)
  > 70 years182 (41)
Gender
 Female226 (51)
 Male219 (49)
Karnofsky performance score
  ≤ 70165 (37)
 80–100237 (53)
 Unknown43 (10)
Type of primary tumor
 Breast cancer125 (28)
 Prostate cancer59 (13)
 Lung cancer138 (31)
 Renal cell carcinoma24 (5)
 Colorectal cancer20 (4)
 Other tumors79 (18)
Interval between cancer diagnosis and RT of bone metastases
  ≤ 8 months226 (51)
  ≥ 9 months219 (49)
Visceral metastases at the time of RT
 No187 (42)
 Yes258 (58)
Other (non-irradiated) bone metastases at the time of RT
 No109 (24)
 Yes334 (75)
 Unknown2 (< 1)
Location of irradiated bone metastases
 Spinal site(s) only170 (38)
 Extraspinal site(s) with or without spinal site(s)275 (62)
Number of irradiated sites
 Single186 (42)
 Multiple259 (58)
Pathological fracture
 No309 (69)
 Yes136 (31)
Pre-RT surgery (no vs. yes)
 No347 (78)
 Yes96 (22)
 Unknown2 (< 1)
Pre-RT administration of bisphosphonates/denosumab
 No268 (60)
 Yes167 (38)
 Unknown10 (2)
Pre-RT systemic anticancer treatment
 No127 (29)
 Yes317 (71)
 Unknown1 (< 1)
Fractionation of RT
 Short-course RT43 (10)
 Longer-course RT402 (90)