Table 1.
Epidemiologic and clinico-pathologic characteristics
| Characteristic | Variable completeness (%)* | Categories | Number (% of available data) |
|---|---|---|---|
| Age at diagnosis (years) | 100 | ≤30 | 50 (5.0) |
| 31–40 | 199 (19.9) | ||
| 41–50 | 355 (35.6) | ||
| 51–60 | 256 (25.7) | ||
| 61–70 | 80 (8.0) | ||
| 71–80 | 47 (4.7) | ||
| >80 | 11 (1.1) | ||
| Sex | 100 | Female | 975 (97.7) |
| Male | 23 (2.3) | ||
| Period of diagnosis | 100 | 2005–2008 | 254 (25.4) |
| 2009–2012 | 280 (28.1) | ||
| 2013–2016 | 464 (46.5) | ||
| Type of specimen | 96.5 | Core needle | 253 (26.3) |
| Open biopsy | 401 (41.6) | ||
| Mastectomy/WLE/quadrantectomy | 309 (32.1) | ||
| Histological type | 71.3 | Invasive ductal | 673 (94.5) |
| Invasive lobular | 23 (3.2) | ||
| Medullary | 2 (0.3) | ||
| Mucinous | 10 (1.4) | ||
| Tubular | 1 (0.1) | ||
| Mixed | 3 (0.4) | ||
| Tumour grade | 91.2 | Low grade | 174 (21.0) |
| Intermediate grade | 444 (53.5) | ||
| High grade | 212 (25.5) |
*The components left out were either missing, improperly documented or ambiguous