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Table 1 Descriptive characteristics of first primary male breast cancer cases from the SEER 18 registries, 1988–2012 (N = 5753)

From: Descriptive characteristics of prostate cancer in patients with a history of primary male breast cancer – a SEER analysis

  n (%)
Age at index breast cancer, years
 Mean (SD) 65.2 (12.6)
Median (interquartile range) 66 (56–75)
 20–44 334 (5.8)
 45–54 869 (15.1)
 55–64 1447 (25.2)
 65–74 1607 (27.9)
 75+ 1496 (26.0)
Race/ethnicity
 Non-Hispanic White 4291 (74.6)
 Black 757 (13.2)
 Asian/Pacific Islander/Alaska Native 311 (5.4)
 Hispanic 340 (5.9)
 Unknown 54  
Breast cancer AJCC stage
 I 1696 (29.5)
 II 2145 (37.3)
 III 951 (16.5)
 Missing/unknown 961  
Hormone receptor status
 ER/PR negative 213 (3.7)
 ER and/or PR positive 4373 (76.0)
 Unknown 1167  
Tumor size
 <2 cm 3923 (68.2)
 ≥2 cm 1348 (23.4)
 Missing 482  
Lymph node status
 Negative 2982 (51.8)
 Positive 2626 (23.4)
 Missing 482  
 Surgery
 Surgery performed 5210 (90.6)
 Refused or not recommended 466 (8.1)
 Missing/unknown 77  
Radiation
 No 4199 (73.0)
 Yes 1371 (23.8)
 Unknown 183  
Outcome status
 Second primary prostate cancer 250 (4.3)
 Other second primary cancer 648 (11.3)
Vital status
 Alive 3312 (57.6)
 Died (any cause) 2441 (42.4)
 Cancer-specific death 1080 (18.8)
Person-years of follow up
 Mean (SD) 5.6 (4.9)
 Median (interquartile range) 4.3 (1.8–8.4)