Breast Cancer Research

Table 2 Patient characteristics stratified according to administrative region and pathology department

From: High inter-laboratory variability in the assessment of HER2-low breast cancer: a national registry study on 50,714 Danish patients

	Number		Age	Histological subtype
			Mean	IDC		ILC		Other
	N	%	Years	N	%	N	%	N	%
Capital Region	15,842	31.2	61.4	12,912	81.5	1808	11.4	1109	7.0
Dept. 1	7576	14.9	60.2	6355	83.9	835	11.0	380	5.0
Dept. 2	7982	15.7	62.4	6314	79.1	944	11.8	717	9.0
Dept. 3	284	0.6	60.9	243	85.6	29	10.2	12	4.2
Zealand	8084	15.9	61.5	6421	79.4	844	10.4	813	10.1
Dept. 4	8084	15.9	61.5	6421	79.4	844	10.4	813	10.1
Southern Denmark	11,700	23.1	61.3	9209	78.7	1204	10.3	1269	10.8
Dept. 5	3355	6.6	62.0	2459	73.3	357	10.6	532	15.9
Dept. 6	2539	5.0	62.6	2109	83.1	262	10.3	164	6.5
Dept. 7	2222	4.4	61.3	1770	79.7	221	9.9	226	10.2
Dept. 8	3584	7.1	59.7	2871	80.1	364	10.2	347	9.7
Central Denmark	10,312	20.3	60.9	8224	79.8	1101	10.7	971	9.4
Dept. 9	3709	7.3	60.2	2772	74.7	399	10.8	528	14.3
Dept. 10	743	1.5	62.3	620	83.4	63	8.5	60	8.1
Dept. 11	2027	4.0	61.0	1699	83.8	199	9.8	129	6.4
Dept. 12	3833	7.6	61.3	3133	81.8	440	11.5	254	6.6
Northern Denmark	4776	9.4	60.9	3885	81.3	513	10.7	373	7.8
Dept. 13	3097	6.1	60.6	2483	80.2	352	11.4	259	8.4
Dept. 14	1679	3.3	61.5	1402	83.5	161	9.6	114	6.8
In total	50,714	100	61.2	40,651	80.2	5470	10.8	4535	8.9

	Size	Estrogen receptor positivity
	Median	0%		1–9%		> 9%
	mm	N	%	N	%	N	%
Capital Region	16	2195	13.9	226	1.4	13,382	84.4
Dept. 1	16	1103	14.6	152	2.0	6300	83.1
Dept. 2	16	1051	13.2	68	0.9	6846	85.7
Dept. 3	20	41	14.4	6	2.1	236	83.1
Zealand	15	1094	13.5	134	1.7	6831	84.4
Dept. 4	15	1094	13.5	134	1.7	6831	84.4
Southern Denmark	16	1664	14.2	198	1.7	9815	83.8
Dept. 5	16	459	13.7	54	1.6	2833	84.4
Dept. 6	16	351	13.8	33	1.3	2152	84.7
Dept. 7	17	287	12.9	52	2.3	1877	84.3
Dept. 8	15	567	15.8	59	1.6	2953	82.4
Central Denmark	16	1375	13.3	159	1.5	8756	84.8
Dept. 9	15	432	11.6	62	1.7	3199	85.9
Dept. 10	18	135	18.2	6	0.8	602	81.0
Dept. 11	17	237	11.7	39	1.9	1748	86.2
Dept. 12	15	571	14.9	52	1.4	3207	83.6
Northern Denmark	16	690	14.4	81	1.7	3996	83.1
Dept. 13	16	433	14.0	54	1.7	2607	83.4
Dept. 14	18	257	15.3	27	1.6	1389	82.5
In total	16	7018	13.8	798	1.6	42,780	84.2

	Histological grade						LN metastasis
	I		II		III
	N	%	N	%	N	%	N	%
Capital Region	4394	27.7	6743	42.6	3328	21.0	5767	36.4
Dept. 1	1812	23.9	3423	45.2	1815	24.0	2785	36.8
Dept. 2	2511	31.5	3201	40.1	1433	18.0	2813	35.2
Dept. 3	71	25.0	119	41.9	80	28.2	169	59.5
Zealand	1764	21.8	3577	44.2	1784	22.1	2655	32.8
Dept. 4	1764	21.8	3577	44.2	1784	22.1	2655	32.8
Southern Denmark	3115	26.6	4871	41.6	2314	19.8	4104	35.1
Dept. 5	933	27.8	1165	34.7	685	20.4	1197	35.7
Dept. 6	700	27.6	1024	40.3	630	24.8	934	36.8
Dept. 7	581	26.1	1020	45.9	366	16.5	755	34.0
Dept. 8	901	25.1	1662	46.4	633	17.7	1218	34.0
Central Denmark	2640	25.6	4502	43.7	2052	19.9	3943	40.1
Dept. 9	808	21.8	1547	41.7	710	19.1	1387	37.4
Dept. 10	213	28.7	287	38.6	182	24.5	354	47.6
Dept. 11	546	26.9	923	45.5	423	20.9	753	37.1
Dept. 12	1073	28.0	1745	45.5	737	19.2	1449	37.8
Northern Denmark	1109	23.2	1963	41.1	1267	26.5	1921	40.2
Dept. 13	805	26.0	1175	37.9	812	26.2	1210	39.1
Dept. 14	304	18.1	788	46.9	455	27.1	711	42.3
In total	13,022	25.7	21,656	42.7	10,745	21.2	18,390	36.3

LN lymph node, IDC invasive ductal carcinoma, ILC invasive lobular carcinoma

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