Research Article
A Matched Case-Control Study of Risk Factors for Breast Cancer Risk in Vietnam
Table 1
Clinical features and pathological data for cases.
| Feature | Result | Cases () | % of Total Cases |
| Estrogen receptor (ER) | Positive | 181 | 61.6 | Negative | 93 | 31.6 | Unavailable | 20 | 6.8 |
| Progesterone receptor (PR) | Positive | 172 | 58.5 | Negative | 102 | 34.7 | Unavailable | 20 | 6.8 |
| Her2/neu | Positive | 63 | 21.4 | Negative | 209 | 71.1 | Unavailable | 22 | 7.5 |
| Pathological type | Ductal carcinoma in situ | 3 | 1.0 | Invasive ductal carcinoma | 205 | 69.7 | Invasive lobular carcinoma | 15 | 5.1 | Mucinous carcinoma | 8 | 2.7 | Papillary carcinoma | 10 | 3.4 | Tubular carcinoma | 8 | 2.7 | Unavailable | 45 | 15.3 |
| Histological | 1 | 25 | 8.5 | 2 | 129 | 43.9 | 3 | 49 | 16.7 | Unavailable | 91 | 31.0 |
| Tumour (T) stage | 1 | 20 | 6.8 | 2 | 199 | 67.7 | 3 | 18 | 6.1 | 4 | 10 | 3.4 | Unavailable | 47 | 16.0 |
| Node (N) stage | 0 | 111 | 37.8 | 1 | 97 | 33.0 | 2 | 39 | 13.3 | Unavailable | 47 | 16.0 |
| Metastasis (M) stage | 0 | 246 | 83.7 | 1 | 1 | 0.3 | Unavailable | 47 | 16.0 |
| AJCC clinical | 1 | 13 | 4.4 | 2a | 102 | 34.7 | 2b | 77 | 26.2 | 3a | 40 | 13.6 | 3b | 14 | 4.8 | 4 | 1 | 0.3 | Unavailable | 47 | 16.0 |
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based on the Nottingham grading system. refers to American Joint Committee on Cancer (AJCC) staging system for breast cancer.
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