Table 1 Baseline characteristics of the newly diagnosed breast cancer patients enrolled in the ABC-DO cohort study
|  | Namibia Non-Black (N = 97) | Namibia Black (N = 380) | Uganda (N = 418) | Nigeria (N = 383) | Zambia (N = 198) | Overall (N = 1476) |
|---|---|---|---|---|---|---|
N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | |
Mean age at diagnosis, years (SD) | 56.7 (12.5) | 52.6 (15.0) | 48.4 (12.7) | 48.7 (12.3) | 50.0 (14.8) | 50.3 (13.7) |
BMI, kg/m2 | Â | Â | Â | Â | Â | Â |
 < 25 | 31 (32.0) | 162 (42.6) | 201 (48.1) | 162 (42.3) | 81 (40.9) | 637 (43.2) |
[25–30[ | 20 (20.6) | 98 (25.8) | 148 (35.4) | 107 (27.9) | 53 (26.8) | 426 (28.9) |
30 +  | 41 (42.3) | 102 (26.8) | 60 (14.4) | 94 (24.5) | 45 (22.7) | 342 (23.2) |
Unknown | 5 (5.2) | 18 (4.7) | 9 (2.2) | 20 (5.2) | 19 (9.6) | 71 (4.8) |
Education | Â | Â | Â | Â | Â | Â |
None/primary | 13 (13.4) | 197 (51.8) | 242 (57.9) | 102 (26.6) | 103 (52.0) | 657 (44.5) |
Secondary/high school | 46 (47.4) | 132 (34.7) | 126 (30.1) | 144 (37.6) | 54 (27.3) | 502 (34.0) |
Technical/university | 38 (39.2) | 51 (13.4) | 50 (12.0) | 137 (35.8) | 41 (20.7) | 317 (21.5) |
HIV status | Â | Â | Â | Â | Â | Â |
Positive | 3 (3.1) | 53 (13.9) | 48 (11.5) | 9 (2.3) | 31 (15.7) | 144 (9.8) |
Hypertension | Â | Â | Â | Â | Â | Â |
Yes | 49 (50.5) | 155 (40.8) | 65 (15.6) | 100 (26.1) | 57 (28.8) | 426 (28.9) |
Tumour stage at diagnosis | Â | Â | Â | Â | Â | Â |
Localized (stage TNM I/II) | 48 (49.5) | 73 (19.2) | 96 (23.0) | 39 (10.2) | 19 (9.6) | 275 (18.6) |
Locally advanced (stage TNM III) | 43 (44.3) | 247 (65.0) | 226 (54.1) | 256 (66.8) | 131 (66.2) | 903 (61.2) |
Metastatic (stage TNM IV) | 6 (6.2) | 60 (15.8) | 64 (15.3) | 60 (15.7) | 13 (6.6) | 203 (13.8) |
Unknown | 0 (0.0) | 0 (0.0) | 32 (7.7) | 28 (7.3) | 35 (17.7) | 95 (6.4) |
Treated | Â | Â | Â | Â | Â | Â |
No | 0 (0.0) | 1 (0.3) | 36 (8.6) | 95 (24.8) | 39 (19.7) | 171 (11.6) |
Yes | 97 (100.0) | 376 (98.9) | 359 (85.9) | 262 (68.4) | 140 (70.7) | 1234 (83.6) |
Unknown | 0 (0.0) | 3 (0.8) | 23 (5.5) | 26 (6.8) | 19 (9.6) | 71 (4.8) |
Surgerya | Â | Â | Â | Â | Â | Â |
No | 9 (9.3) | 88 (23.2) | 125 (29.9) | 150 (39.2) | 85 (42.9) | 457 (31.0) |
Yes | 84 (86.6) | 244 (64.2) | 240 (57.4) | 183 (47.8) | 90 (45.5) | 841 (57.0) |
Unknown | 4 (4.1) | 48 (12.6) | 53 (12.7) | 50 (13.1) | 23 (11.6) | 178 (12.1) |
Radiotherapy | Â | Â | Â | Â | Â | Â |
No | 24 (24.7) | 72 (18.9) | 276 (66.0) | 308 (80.4) | 130 (65.7) | 810 (54.9) |
Yes | 71 (73.2) | 287 (75.5) | 56 (13.4) | 11 (2.9) | 40 (20.2) | 465 (31.5) |
Unknown | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
Endocrine therapy | Â | Â | Â | Â | Â | Â |
No | 18 (18.6) | 76 (20.0) | 194 (46.4) | 210 (54.8) | 109 (55.1) | 607 (41.1) |
Yes | 76 (78.4) | 276 (72.6) | 151 (36.1) | 127 (33.2) | 64 (32.3) | 694 (47.0) |
Unknown | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
Chemotherapy | Â | Â | Â | Â | Â | Â |
No | 26 (26.8) | 64 (16.8) | 74 (17.7) | 164 (42.8) | 55 (27.8) | 383 (25.9) |
Yes | 70 (72.2) | 290 (76.3) | 283 (67.7) | 170 (44.4) | 115 (58.1) | 928 (62.9) |
Unknown | 1 (1.0) | 26 (6.8) | 61 (14.6) | 49 (12.8) | 28 (14.1) | 165 (11.2) |