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Table 1 Baseline clinical characteristics and radiation exposure (main analysis)

From: Cost of palliative radiation to the bone for patients with bone metastases secondary to breast or prostate cancer

  Breast cancer Prostate cancer
Patients with radiation to the bone, n 207 213
Demographics   
Mean age, years (SD) 65 (12.5) 74 (8.4)
Age, n (%)   
  <65 years 93 (44.9) 31 (14.6)
  ≥65 years 114 (55.1) 182 (85.4)
Female, n (%) 202 (97.6) n/a
Payor,* n (%)   
  Medicare 103 (49.8) 133 (62.4)
  Commercial 94 (45.4) 64 (30.0)
  Medicaid 7 (3.4) 3 (1.4)
  Other 3 (1.4) 13 (6.1)
Radiation profile   
Total REOCs, n 220 233
Length of treatment, days   
  Mean (SD) 30 (16.0) 30 (16.7)
  Median 26 26
Dose, cGy   
  Mean by episode 3207 3301
  Mean per patient 3409 3611
  Mean by fraction 327 337
Radiation schedule by REOC, n   
  Daily 201 203
  Greater than daily 7 13
  Less than daily** 0 0
Site radiated by REOC*** n (%)   
  Femur 14 (6.8) 28 (13.1)
  Hip 45 (21.7) 40 (18.8)
  Humerus 3 (1.4) 9 (4.2)
  Pelvis 20 (9.7) 34 (16.0)
  Rib 12 (5.8) 12 (5.6)
  Sacrum 21 (10.1) 17 (8.0)
  Skull 9 (4.3) 10 (4.7)
  Spine 97 (46.9) 95 (44.6)
  Other bone sites 28 (13.5) 27 (12.7)
Total fractions 2173 2344
Fractions by REOC   
  Mean (SD) 9 (5) 10 (4)
  Median 10 10
Fractionation schedule, n   
  1 9 10
  4 to 5 21 23
  10 35 43
  15 47 47
  Other 102 96
Fractions by site, n   
  Femur 10.2 9.7
  Hip 10.0 9.6
  Humerus 9.0 10.3
  Pelvis 8.7 8.1
  Rib 9.4 5.0
  Sacrum 10.6 10.9
  Skull 11.3 10.5
  Spine 9.9 10.2
  Other bone site 8.8 10.4
  1. *A patient could have multiple payor coverage for the same procedure.
  2. ** Every other day.
  3. *** A patient could be counted multiple times with radiation to the same site or to multiple sites.
  4. Fractionation schedule is the count of unique patients by the range of total number of fractions across REOCs.
  5. Fractions by site are a sum of all fractions received across REOCs stratified by bone site.