A population-based study of Kurdish breast cancer in northern Iraq: Hormone receptor and HER2 status. A comparison with Arabic women and United States SEER data

Table 3 Estrogen receptor (ER) and HER2 status in breast cancers of all patients (Sulaimaniyah Kurds, non-Sulaimaniyah Kurds and Arabs) having immunohistochemistry studies

Characteristic	ER+/HER2-		ER+/HER2+		ER-/HER2-		ER-/HER2+		Triple negative		P value*
	No.	%	No.	%	No.	%	No.	%	No.	%
age											0.12
20-49	154	59.9	31	12.1	36	14.0	36	14.0	30	11.7
50-59	71	69.6	5	4.9	14	13.7	12	11.8	12	11.8
≥ 60	54	78.3	5	7.2	5	7.2	5	7.2	5	7.2
Stage											0.81
1	24	64.9	5	13.5	6	16.2	2	5.4	4	10.8
2	92	68.1	10	7.4	17	12.6	16	11.9	13	9.6
3	73	63.5	12	10.4	13	11.3	17	14.8	13	11.3
4	16	57.1	5	17.9	5	17.9	2	7.1	4	14.3
Grade											<0.001
I	43	97.7	0	0	1	2.3	0	0	1	2.3
II	157	80.9	12	6.2	11	5.7	14	7.2	8	4.1
III	65	40.6	22	13.8	38	23.8	35	21.9	33	20.6

* Comparing the distribution of ER/HER2 status and triple negative tumors by patient age, tumor stage, and tumor grade (X ² tests).
Tumor characteristics are compared by age, tumor stage, and tumor grade.

ISSN: 1472-6874