Clinical features of breast cancer (all ages)
| Symptom in the preceding year | Cases, n (%) n = 3994 | Controls, n (%) n = 16 873 | Likelihood ratio (95% CI) | Odds ratio in multivariable analysis (95% CI) |
|---|---|---|---|---|
| Breast lump | 1762 (44.1) | 132 (0.8) | 56 (47 to 67) | 110 (88 to 150) |
| Breast pain | 95 (2.4) | 127 (0.8) | 3.2 (2.4 to 4.1) | 4.2 (3.0 to 6.0) |
| Nipple retraction | 40 (1.0) | 9 (0.1) | 19 (9.1 to 39) | 26 (10 to 64) |
| Nipple discharge | 41 (1.0) | 15 (0.1) | 12 (6.4 to 21) | 19 (8.6 to 41) |
Note: All associations in the model have P < 0.001.