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Table 6 Comparison of intrinsic subtypes distribution in different populations

From: The relevance of the intrinsic subtype to the clinicopathological features and biomarkers in Japanese breast cancer patients

Reference Country All patients (%) ER/PR + HER2- ER/PR + HER2+ HER2 type Basel-like Unclassified
Our research Japan 471 (100) 306 (65.0) 41 (8.7) 59 (12.5) 37 (7.9) 28 (5.9)
Shibuta et al . [[6]] Japan 4,266 (100) 3,046 (71) 321 (8) 398 (9) 501 (12)
Carey et al . [[2]] US 496 (100) 255 (51.4) 77 (15.5) 33 (6.7) 100 (20.1) 31 (6.3)
African American 196 (100) 93 (47.4) 25 (12.8) 16 (8.2) 52 (26.5) 10 (5.1)
Non-African American 300 (100) 162 (54) 52 (17.3) 17 (5.7) 48 (16) 21 (7)
Tamimi et al . [[3]] US 2,249 (100) 1,650 (73) 116 (5) 128 (6) 245 (11) 110 (5)