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Table 2 Distribution of breast cancer tumor subtypes by race/ethnicity in the combined LACE and Pathways Studies (n = 2544)

From: Epidemiology of breast cancer subtypes in two prospective cohort studies of breast cancer survivors

Tumor subtype White n (%) African American n (%) Asian n (%) Hispanic n (%) Other n (%) Pvaluea
Luminal A
(ER+ and/or PR+, Her2-)
n = 1868 (73.4)
1464 (75.3) 92 (59.4) 135 (71.4) 135 (68.5) 37 (68.5) 0.0001
Luminal B
(ER+ and/or PR+, Her2+)
n = 294 (11.6)
215 (11.1) 14 (9.0) 30 (15.9) 28 (14.2) 7 (13.0) 0.18
Triple negative
(ER-, PR-, Her2-)
n = 288 (11.3)
204 (10.5) 44 (28.4) 12 (6.3) 21 (10.7) 7 (13.0) < 0.0001
Her2 overexpressing
(ER-, PR-, Her2+)
n = 94 (3.7)
60 (3.1) 5 (3.2) 12 (6.4) 13 (6.6) 3 (5.5) 0.03
Total n = 2544 (100) 1943 (100) 155 (100) 189 (100) 197 (100) 54 (100) ---
  1. a From Pearson chi-square test across racial/ethnic categories.
  2. ER = estrogen receptor; Her2 = human epidermal growth receptor 2; PR = progesterone receptor; + = positive; - = negative.