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Table 1 General patient and tumor characteristics (n = 2,862)

From: Cause of death for patients with breast cancer: discordance between death certificates and medical files, and impact on survival estimates

Category Subgroups N of patients (%)
Age at time of diagnosis <40 years 188 6,6
40-49 562 19,6
50-59 778 27,2
60-69 709 24,8
70-79 423 14,8
≥80 202 7,1
Year of diagnosis 2009 489 17,1
2010 448 15,7
2011 468 16,4
2012 483 16,9
2013 500 17,5
2014 474 16,6
Stage at diagnosis Stage 0 47 1,6
Stage I 1063 37,1
Stage II 1174 41,0
Stage III 357 12,5
Stage IV 158 5,5
Stage unknown 63 2,2
Tumor Grade Grade 1 319 11,1
Grade 2 1378 48,1
Grade 3 1126 39,3
Grade unknown 39 1,4
Multiple tumors No 2733 95,5
2+ 129 4,5
Treatmenta Breast Conserving Surgery 1374 48,0
Mastectomy 1311 45,8
Radiotherapy 2354 82,3
Chemotherapy 1296 45,3
Hormonal therapy 2344 81,9
Morphology Ductal 2118 74,0
Lobular 337 11,8
Other 407 14,2
  1. aSome patients receive multiple different treatment interventions within each subgroup (surgery or systemic therapy) during their follow-up period