Table 3 Associations between patient and tumour characteristics in black vs non-black women diagnosed at age ≤ 50 vs > 50 years
From: Triple-negative breast cancers are increased in black women regardless of age or body mass index
| Â | Black | Non-black | ||
|---|---|---|---|---|
Patient/tumour characteristic (p-value*) | age ≤50 years (premenopausal) | age >50 years (postmenopausal) | age ≤50 years (premenopausal) | age >50 years (postmenopausal) |
| Â | n (%) | n (%) | n (%) | n (%) |
BMI (0.03) | Â | Â | Â | Â |
   Underweight/normal (<25) | 10 (20) | 22 (17) | 23 (33) | 40 (24) |
   Overweight (25 to <30) | 16 (31) | 31 (25) | 20 (29) | 55 (32) |
   Obesity I (30 to <35) | 13 (25) | 42 (33) | 14 (20) | 42 (25) |
   Obesity II (35 to <40) | 4 (7.8) | 22 (17) | 9 (13) | 16 (9.4) |
Obesity III (≥ 40) Missing | 8 (16) 0 (0) | 7 (5.6) 2 (1.6) | 2 (2.9) 1 (1.5) | 12 (7.1) 5 (2.9) |
Immunophenotype (<0.0001) | Â | Â | Â | Â |
   Triple negative | 16 (31) | 36 (29) | 12 (17) | 17 (10) |
Other Missing | 35 (69) 0 (0) | 8 (70) 2 (1.6) | 56 (81) 1 (1.5) | 151 (89) 2 (1.2) |
Grade (0.06) | Â | Â | Â | Â |
   1 | 3 (5.9) | 11 (8.7) | 13 (19) | 27 (16) |
   2 | 19 (37) | 53 (42) | 25 (36) | 80 (47) |
3 Missing | 26 (51) 3 (5.9) | 52 (41) 10 (7.9) | 30 (44) 1 (1.5) | 56 (33) 7 (4.1) |
Nodal involvement (0.03) | Â | Â | Â | Â |
   Node negative | 13 (25) | 48 (38) | 31 (45) | 51 (30) |
Node positive Missing | 29 (57) 9 (18) | 52 (41) 26 (21) | 30 (43) 8 (12) | 71 (42) 48 (28) |
Total number (%) of all patients | 51 (12) | 126 (30) | 69 (17) | 170 (41) |