Skip to main content

Table 1 Characteristics of patients with primary BC, 1993–2013

From: Risk of second primary Cancer among bladder Cancer patients: a population-based cohort study in Korea

  Total Men Women
  n % n % n %
Patients with BC 48,875 100 39,351 100 9524 100
Period of BC diagnosis
 1993–1997 6892 14.10 5592 14.21 1300 13.65
 1998–2002 10,484 21.45 8377 21.29 2107 22.12
 2003–2007 13,585 27.80 10,942 27.81 2643 27.75
 2008–2013 17,914 36.65 14,440 36.70 3474 36.48
Average age at diagnosis with BC (years; mean, SD) 65.39 12.46 64.81 12.20 67.80 13.22
Median age at diagnosis with BC (years; median, range) 67 105 (1–106) 66 100 (1–101) 70 105 (1–106)
Age at primary BC diagnosis (years)
 0–39 1608 3.29 1259 3.20 349 3.66
 40–59 12,489 25.55 10,601 26.94 1888 19.82
 ≥60 34,778 71.16 27,491 69.86 7287 76.51
Percentage of primary treatment status
 Surgery 42,448 86.85 34,653 88.06 7795 81.85
 Radiation 1298 2.66 1004 2.55 294 3.09
 Chemotherapy 6161 12.61 5045 12.82 1116 11.72
Average follow-up after BC diagnosis (years; mean, SD) 5.65 5.09 5.70 5.06 5.46 5.21
Median follow-up after BC diagnosis (years; median, range) 4.13 20.80(0–20.80) 4.21 20.80(0–20.80) 3.67 20.80(0–20.80)
Number of patients who developed a SPC 3495 7.15 3116 7.92 379 3.98
Average age at SPC diagnosis (years; mean, SD) 70.57 9.28 70.71 8.94 69.40 11.67
Median age at SPC diagnosis (years; median, range)   71(10–95)   71.5(10–95)   71(12–93)
Average interval between primary cancer and SPC (years; mean, SD) 5.23 4.30 5.18 4.29 5.75 4.39
Median interval between primary cancer and SPC (years; median, range)   4.17(0.17–0.67)   4.08(0.17–20.67)   4.75(0.17–19.08)
Number of patients by latency between primary cancer and SPC (years)
 1 556 15.91 469 12.95 47 16.19
 1–4 1409 40.31 1176 39.67 144 40.61
 5–9 1000 28.61 813 29.20 106 28.07
 ≥10 530 15.16 438 18.18 66 15.12
Number of patients by age at SPC diagnosis (years)
 0–39 13 0.37 8 0.26 5 1.32
 40–59 396 11.33 327 10.49 69 18.21
 ≥60 3086 88.30 2781 89.25 305 80.47
Average follow-up after SPC diagnosis, (years; mean, SD) 2.55 2.91 2.48 2.82 3.10 3.52
Median follow-up after SPC diagnosis (years; median, range) 1.42 20.00(0–20.00) 1.42 20.00(0–20.00) 1.67 19.50(0–19.50)
Number of subsequent primary cancers
 1 3259 6.67 2896 7.36 363 3.81
 2 217 0.44 203 0.52 14 0.15
 ≥3 19 0.04 17 0.04 2 0.02
  1. BC: bladder cancer, SD: standard deviation, SPC: second primary cancer