Table 2b New grading system for size groups – recurrence of ipsilateral DCIS or invasive carcinoma
Feature | Category | No. cases | No. events | HR (95% CI) | χ 2 for trend, P- value |
|---|---|---|---|---|---|
Tumour size <9 mm | |||||
New grade, three tier | Low/intermediate | 132 | 3 | 0.21 (0.05–0.71) | 8.57 |
High | 108 | 9 | 0.75 (0.32 – 1.71) | P=0.011 | |
Very High | 128 | 15 | 1.00a | ||
Tumour size 10–19 mm | |||||
New grade, three tier | Low/intermediate | 116 | 9 | 0.43 (0.21–0.90) | 8.77 |
High | 222 | 23 | 0.55 (0.33–0.91) | P=0.01 | |
Very high | 237 | 45 | 1.00a | ||
Tumour size >20 mm | |||||
New grade, three tier | Low/intermediate | 62 | 7 | 0.46 (0.31–1.15) | 4.65 |
High | 94 | 14 | 0.46 (0.20–1.06) | P=0.09 | |
Very high | 112 | 28 | 1.00a |
