Table 2 Standardized incidence ratios categorised by either a second breast cancer diagnosis or a second primary cancer other than breast cancer, by time intervals after first diagnosis of breast cancer
From: Multiple primary tumours in women following breast cancer, 1973–2000
Less than 10 years after initial breast cancer | 10–19 years after initial breast cancer | 20–29 years after initial breast cancer | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Second primary breast cancer | Second primary non-breast cancer | Second primary breast cancer | Second primary non-breast cancer | Second primary - breast cancer | Second primary - non-breast cancer | |||||||
Age in years | SIR | 95% CI | SIR | 95% CI | SIR | 95% CI | SIR | 95% CI | SIR | 95% CI | SIR | 95% CI |
20–29 | 48.4 | (46.5, 50.3) | 8.90 | (8.3, 9.6) | 11.5 | (10.6, 12.4) | 1.46 | (1.3, 1.2) | 0.2 | (0.2, 0.3) | 0.5 | (0.4, 0.6) |
30–39 | 44.1 | (42.3, 45.9) | 2.79 | (2.6, 3.0) | 2.1 | (1.9, 2.3) | 1.35 | (1.2, 1.5) | 0.3 | (0.2, 0.3) | 0.3 | (0.3, 0.4) |
40–49 | 12.1 | (11.6, 12.6) | 4.08 | (3.8, 4.3) | 1.3 | (1.2, 1.4) | 0.88 | (0.8, 1.0) | 0.3 | (0.2, 0.3) | 0.0 | (0.0, 0.05) |
50–59 | 10.9 | (10.6, 11.3) | 4.75 | (4.6, 5.0) | 1.5 | (1.4, 1.6) | 0.99 | (0.9, 1.1) | 0.1 | (0.1, 0.2) | 0.2 | (0.2, 0.2) |
60–69 | 6.4 | (6.2, 6.6) | 2.99 | (2.9, 3.1) | 0.4 | (0.3, 0.4) | 0.50 | (0.5, 0.5) | 0.1 | (0.1, 0.1) | 0.1 | (0.1, 0.2) |
70+ | 1.8 | (1.8, 1.9) | 1.60 | (1.5, 1.7) | 0.2 | (0.2, 0.2) | 0.30 | (0.3, 0.3) | 0.1 | (0.1, 0.1) | 0.1 | (0.1, 0.1) |
