Table 2.

Differences in breast cancer subtype by year, age, and race in premenopausal women.

			Total				Triple Positive				HR+ HER2−				HR− HER2+						Triple Negative
		N	Col%	N	Row%	OR	LCL	UCL	p	N	Row%	N	Row%	OR	LCL	UCL	p	N	Row%	OR	LCL	UCL	p
Total		902	100	74	8.2					682	75.6	54	6.0					92	10.2
Age	18–39	221	24.5	31	14.0	1.00				137	62.0	22	10.0	1.00				31	14.0	1.00
Age	40–49	681	75.5	43	6.8	0.38	0.23	0.63	0.0002	545	79.7	32	4.7	0.36	0.20	0.65	0.0007	61	8.9	0.49	0.30	0.81	0.005
Race	White	190	21.1	17	8.9	1.00				135	71.1	9	4.7	1.00				29	15.3	1.00
Race	Asian	319	35.4	16	4.7	0.49	0.23	1.02	0.06	251	77.2	16	5.8	1.13	0.48	2.66	0.79	36	12.3	0.74	0.43	1.28	0.28
Race	Filipino	179	19.8	20	11.2	1.25	0.61	2.54	0.55	130	71.3	14	8.8	1.85	0.76	4.48	0.18	15	8.8	0.57	0.29	1.14	0.11
Race	NHPI	193	21.4	18	8.8	0.88	0.43	1.81	0.73	153	79.7	13	7.0	1.31	0.54	3.21	0.55	9	4.5	0.26	0.12	0.58	0.001
Race	other	21	2.3	3	12.4	1.58	0.39	6.41	0.52	13	62.1	2	10.8	2.60	0.50	13.65	0.26	3	14.8	1.11	0.29	4.27	0.88
Year	2015	134	14.9	7	5.2	1.00				108	80.6	6	4.5	1.00				13	9.7	1.00
Year	2016	117	13.0	7	6.0	1.14	0.38	3.42	0.81	95	81.3	8	7.0	1.54	0.51	4.67	0.44	7	5.7	0.58	0.22	1.54	0.28
Year	2017	140	15.5	5	3.4	0.64	0.20	2.11	0.47	115	82.5	11	7.9	1.73	0.61	4.89	0.30	9	6.1	0.62	0.25	1.52	0.29
Year	2018	139	15.4	11	8.0	1.50	0.55	4.08	0.42	113	82.0	6	4.1	0.90	0.28	2.93	0.87	9	5.9	0.59	0.24	1.46	0.26
Year	2019	128	14.2	15	10.9	2.34	0.89	6.12	0.08	88	71.9	7	4.9	1.23	0.39	3.88	0.72	18	12.3	1.42	0.65	3.13	0.38
Year	2020	96	10.6	7	6.6	1.40	0.46	4.26	0.55	67	72.8	8	8.0	1.98	0.64	6.09	0.23	14	12.5	1.43	0.62	3.30	0.40
Year	2021	87	9.6	16	18.5	4.32	1.65	11.31	0.003	57	66.2	5	5.6	1.52	0.44	5.27	0.51	9	9.7	1.22	0.49	3.07	0.67
Year	2022	61	6.8	6	9.4	2.29	0.71	7.37	0.16	39	63.3	3	4.9	1.40	0.33	5.96	0.65	13	22.4	2.94	1.23	7.02	0.02

Col% = Column %; OR = odds ratio; LCL = lower confidence limit; UCL = upper confidence limit; NHPI = Native Hawaiian or Pacific Islander.