Table 2 Age at diagnosis in relation to breast cancer-specific mortality
From: Age at diagnosis in relation to survival following breast cancer: a cohort study
Age at diagnosis (years) | Subjects | Person-years | Breast cancer deaths (all deaths) | Breast cancer mortality/10,000 a | Relative risk (95% CI) | Relative risk b (95% CI) | Relative risk c (95% CI) | |
|---|---|---|---|---|---|---|---|---|
5-year follow-up | <40 | 164 | 722 | 40 (45) | 554 | 1.34 (0.94-1.92) | 0.95 (0.72-1.25) | 0.85 (0.65-1.12) |
40-49 | 630 | 2,846 | 117 (133) | 411 | 1.00 | 1.00 | 1.00 | |
50-59 | 886 | 3,801 | 195 (226) | 513 | 1.25 (0.99-1.57) | 1.08 (0.88-1.33) | 1.07 (0.87-1.31) | |
60-69 | 1,062 | 4,559 | 204 (283) | 448 | 1.09 (0.87-1.36) | 1.02 (0.83-1.26) | 1.08 (0.87-1.34) | |
70-79 | 818 | 3,146 | 177 (330) | 563 | 1.36 (1.08-1.72) | 1.02 (0.82-1.28) | 1.15 (0.91-1.45) | |
≥80 | 559 | 1,607 | 130 (378) | 809 | 1.93 (1.50-2.48) | 1.32 (0.96-1.83) | 1.53 (1.08-2.16) | |
All | 4,119 | 16,681 | 863 (1395) | 517 | ||||
10-year follow-up | <40 | 164 | 1,251 | 59 (66) | 472 | 1.40 (1.04-1.88) | 0.96 (0.77-1.20) | 0.89 (0.71-1.12) |
40-49 | 630 | 5,173 | 171 (193) | 331 | 1.00 | 1.00 | 1.00 | |
50-59 | 886 | 6,817 | 276 (337) | 405 | 1.22 (1.01-1.47) | 1.11 (0.94-1.32) | 1.08 (0.91-1.28) | |
60-69 | 1,062 | 8,017 | 283 (445) | 353 | 1.05 (0.87-1.27) | 1.06 (0.89-1.26) | 1.08 (0.90-1.29) | |
70-79 | 818 | 5,034 | 240 (543) | 477 | 1.37 (1.12-1.66) | 0.99 (0.82-1.21) | 1.10 (0.90-1.35) | |
≥80 | 559 | 2,168 | 147 (497) | 678 | 1.80 (1.45-2.25) | 1.44 (1.07-1.93) | 1.61 (1.18-2.20) | |
All | 4,119 | 28,460 | 1,176 (2081) | 413 |