Table 1 Comparison of clinicopathological features of TNBC patients bearing positive or negative CAIX tumour cell expression
Factors | CAIX | ||
|---|---|---|---|
CAIX negative | CAIX positive | P value | |
Age at diagnosisa (years) | 55.5 (47, 63) | 55 (44, 61.8) | 0.230 |
Ethnicity | Â | Â | 0.617 |
 Chinese | 153 (84.1%) | 93 (78.8%) |  |
 Indian | 9 (4.9%) | 8 (6.8%) |  |
 Malay | 9 (4.9%) | 6 (5.1%) |  |
 Others | 11 (6%) | 11 (9.3%) |  |
Laterality | Â | Â | 0.642 |
 Left | 98 (52.4%) | 60 (49.2%) |  |
 Right | 89 (47.6%) | 62 (50.8%) |  |
Histological grade |  |  | < 0.001* |
 1/2 | 40 (21.7%) | 8 (6.6%) |  |
 3 | 144 (78.3%) | 114 (93.4%) |  |
Tumour size 20Â mm | Â | Â | 0.002* |
 ≤ 20 mm | 70 (38.7%) | 25 (21.4%) |  |
 > 20 mm | 111 (61.3%) | 92 (78.6%) |  |
Lymphovascular invasion | Â | Â | 0.058 |
 No | 122 (68.9%) | 64 (57.7%) |  |
 Yes | 55 (31.1%) | 47 (42.3%) |  |
Lymph node positivity | Â | Â | 0.072 |
 Absent | 84 (62.7%) | 44 (50.0%) |  |
 Present | 50 (37.3%) | 44 (50.0%) |  |
Tumour borders | Â | Â | 0.112 |
 Infiltrative | 131 (97.0%) | 78 (91.8%) |  |
 Pushing | 4 (3.0%) | 7 (8.2%) |  |