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Table 2 Descriptive statistics for the 537 breast cancer cases with molecular subtyping

From: The association of women’s birth size with risk of molecular breast cancer subtypes: a cohort study

  Luminal A Luminal B (HER-) Luminal B (HER+) HER 2 type Triple negative Total
Number (%) 232 (43.2) 175 (32.6) 65 (12.1) 24 (4.5) 41 (7.6) 537 (100)
Mean age at diagnosis (SD) 56.4 (9.8) 54.1 (11.3) 53.8 (9.8) 51.5 (10.7) 53.9 (11.3) 54.9 (10.5)
Tumour grade (%)
 1 58 (25.0) 3 (1.7) 1 (1.5) 1 (4.2) 0 63 (11.7)
 2 155 (66.8) 93 (53.1) 19 (29.2) 3 (12.5) 6 (14.6) 276 (51.4)
 3 19 (8.2) 79 (45.1) 45 (69.2) 20 (83.3) 35 (85.4) 198 (36.9)
Histopathological type
 Ductal 198 (85.3) 155 (88.6) 60 (92.3) 18 (75.0) 31 (75.6) 462 (86.0)
 Lobular 24 (10.3) 8 (4.6) 2 (3.1) 0 0 34 (6.3)
 Tubular 2 (0.9) 0 0 0 0 2 (0.4)
 Mucinous 6 (2.6) 2 (1.1) 0 0 0 8 (1.5)
 Medullary 0 6 (3.4) 3 (4.6) 6 (25.0) 6 (14.6) 21 (3.9)
 Papillary 0 1 (0.6) 0 0 0 1 (0.2)
 Metaplastic 0 0 0 0 2 (4.9) 2 (0.4)
 Other 2 (0.9) 3 (1.7) 0 0 2 (4.9) 7 (1.3)
Tumour size, cm (%)
  < 2 151 (65.1) 79 (45.1) 26 (40.0) 4 (16.7) 14 (34.2) 274 (51.0)
 2–5 49 (21.1) 59 (33.7) 28 (43.1) 10 (41.7) 16 (39.0) 162 (30.2)
  > 5 5 (2.2) 7 (4.0) 1 (1.5) 0 2 (4.9) 15 (2.8)
 Uncertain 27 (11.6) 30 (17.1) 10 (15.4) 10 (41.7) 9 (22.0) 86 (16.0)
Stage
 0 0 0 0 1 (4.2) 0 1 (0.2)
 I 105 (45.3) 57 (32.6) 14 (21.5) 8 (33.3) 17 (41.5) 201 (37.4)
 II 92 (39.7) 90 (51.4) 37 (56.9) 12 (50.0) 14 (34.2) 245 (45.6)
 III 10 (4.3) 8 (4.6) 3 (4.6) 1 (4.2) 3 (7.3) 25 (4.7)
 IV 4 (1.7) 4 (2.3) 4 (6.2) 1 (4.2) 1 (2.4) 12 (2.6)
 Unknown 21 (9.1) 16 (9.1) 7 (10.8) 1 (4.2) 6 (14.6) 51 (9.5)