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Results of two-sample t tests for differences between groups
| Groups | Mean tumour size (mm) | p | Mean age at diagnosis (years) | p |
|---|---|---|---|---|
| Ductal | 14.9 | 0.03 | 49.1 | 0.007 |
| Lobular | 23.5 | 53.2 | ||
| Grade 1 | 9.6 | 0.000 | 49.5 | 0.72 |
| Grade 3 | 18.4 | 49.9 | ||
| Node pos | 22.1 | 0.000 | 49.6 | 0.97 |
| Node neg | 13.8 | 49.5 | ||
| ER negative | 17.1 | 0.59 | 48.7 | 0.57 |
| ER positive | 15.8 | 49.5 | ||
| Dead | 22.0 | 0.12 | 48.7 | 0.67 |
| Alive | 15.4 | 49.6 |
