Table 1.

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

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

^aSome patients receive multiple different treatment interventions within each subgroup (surgery or systemic therapy) during their follow-up period