Table 1 Observed number of patients with positive lymph nodes and predicted probability of positive nodes
From: Validation of the CancerMath prognostic tool for breast cancer in Southeast Asia
| Â | Number of patients | Number of patients with positive lymph nodes (percentage) | Predicted probability of positive nodes (median) |
|---|---|---|---|
Overall | 6807 | 2970 (43.6Â %) | 40.6Â % |
Ethnicity | |||
 Chinese | 5029 | 2062 (41.0 %) | 39.2 % |
 Malay | 963 | 511 (53.1 %) | 46.0 % |
 Indian | 651 | 312 (47.9 %) | 44.7 % |
 Other | 164 | 85 (51.8 %) | 39.5 % |
Country | |||
 Malaysia | 3274 | 1460 (44.6 %) | 43.0 % |
 Singapore | 3533 | 1510 (42.7 %) | 38.5 % |
Period of diagnosis | |||
 1990–1994 | 124 | 58 (46.8 %) | 52.0 % |
 1995–1999 | 547 | 258 (47.2 %) | 41.9 % |
 2000–2003 | 1744 | 755 (43.3 %) | 41.4 % |
 2004–2007 | 2129 | 964 (45.3 %) | 41.2 % |
 2008–2011 | 2263 | 935 (41.3 %) | 38.9 % |
Age at diagnosis | |||
 0–39 | 670 | 310 (46.3 %) | 47.1 % |
 40–49 | 2039 | 910 (44.6 %) | 42.9 % |
 50–59 | 2145 | 934 (43.5 %) | 41.4 % |
 60–69 | 1301 | 546 (42.0 %) | 36.7 % |
 70+ | 652 | 270 (41.4 %) | 34.3 % |
Tumor size (mm) | |||
 0–20 | 2926 | 822 (28.1 %) | 26.4 % |
 21–50 | 3247 | 1678 (51.7 %) | 49.3 % |
 51+ | 634 | 470 (74.1 %) | 79.2 % |
ER status | |||
 Negative | 2316 | 1037 (44.8 %) | 43.5 % |
 Positive | 4254 | 1854 (43.6 %) | 38.5 % |
 Unknown | 237 | 79 (33.3 %) | 44.5 % |
PR status | |||
 Negative | 2656 | 1195 (45.0 %) | 42.1 % |
 Positive | 3507 | 1511 (43.1 %) | 38.5 % |
 Unknown | 644 | 264 (41.0 %) | 44.2 % |
Her2 status | |||
 Negative | 2872 | 1197 (41.7 %) | 39.2 % |
 Equivocal | 429 | 182 (42.4 %) | 39.2 % |
 Positive | 1315 | 662 (50.3 %) | 45.0 % |
 Unknown | 2191 | 929 (42.4 %) | 39.6 % |
Histology | |||
 Ductal | 5945 | 2681 (45.1 %) | 41.5 % |
 Lobular | 287 | 150 (52.3 %) | 37.9 % |
 Mucinous | 219 | 34 (15.5 %) | 10.7 % |
 Others | 352 | 102 (29.0 %) | 35.8 % |
 Unknown | 4 | 3 (75.0 %) | 25.1 % |
Grade | |||
 1 | 849 | 204 (24.0 %) | 21.8 % |
 2 | 2836 | 1278 (45.1 %) | 40.6 % |
 3 | 2463 | 1275 (51.8 %) | 46.4 % |
 Unknown | 659 | 213 (32.3 %) | 35.9 % |