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Table 1 Baseline characteristics of the newly diagnosed breast cancer patients enrolled in the ABC-DO cohort study

From: Self-reported arm and shoulder problems in breast cancer survivors in Sub-Saharan Africa: the African Breast Cancer-Disparities in Outcomes 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       
 < 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       
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       
Positive 3 (3.1) 53 (13.9) 48 (11.5) 9 (2.3) 31 (15.7) 144 (9.8)
Hypertension       
Yes 49 (50.5) 155 (40.8) 65 (15.6) 100 (26.1) 57 (28.8) 426 (28.9)
Tumour stage at diagnosis       
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       
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       
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       
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       
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       
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)
  1. aIn ABC-DO, surgeries were mostly mastectomies (82%) as compared to lumpectomies. These were, respectively, 80%, 92%, 91%, 50% and 94% in Namibian Non-Black, Namibian Black, Ugandan, Nigerian, and Zambian women