From: Age at diagnosis in relation to survival following breast cancer: a cohort study
Diagnostic period | 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) |
---|---|---|---|---|---|---|---|---|
1961-1970 | <40 | 51 | 214 | 16 (18) | 747 | 1.39 (0.79-2.45) | 1.69 (0.96-2.98) | 1.23 (0.69-2.20) |
40-49 | 214 | 940 | 50 (56) | 532 | 1.00 | 1.00 | 1.00 | |
50-59 | 256 | 1,008 | 82 (88) | 813 | 1.53 (1.07-2.17) | 1.51 (1.06-2.16) | 1.46 (1.00-2.11) | |
60-69 | 274 | 1,107 | 65 (93) | 587 | 1.10 (0.76-1.59) | 1.15 (0.79-1.67) | 1.12 0-75-1.66) | |
70-79 | 189 | 673 | 45 (92) | 669 | 1.25 (0.83-1.86) | 1.33 (0.88-2.02) | 1.35 (0.87-2.09) | |
≥80 | 108 | 252 | 29 (82) | 1,151 | 2.10 (1.33-3.32) | 1.39 (0.86-2.27) | 1.21 (0.72-2.03) | |
All | 1,092 | 4,193 | 287 (429) | 684 | ||||
1971-1980 | <40 | 44 | 201 | 8 (10) | 399 | 1.16 (0.54-2.51) | 1.17 (0.54-2.55) | 1.09 (0.50-2.39) |
40-49 | 211 | 960 | 33 (39) | 344 | 1.00 | 1.00 | 1.00 | |
50-59 | 343 | 1,535 | 65 (76) | 423 | 1.23 (0.81-1.87) | 1.15 (0.75-1.77) | 1.18 (0.76-1.82) | |
60-69 | 386 | 1,633 | 84 (116) | 514 | 1.49 (1.00-2.23) | 1.65 (1.09-2.48) | 1.69 (1.11-2.57) | |
70-79 | 287 | 1,084 | 72 (122) | 664 | 1.92 (1.27-2.90) | 1.78 (1.16-2.72) | 1.81 (1.17-2.81) | |
≥80 | 181 | 518 | 44 (119) | 849 | 2.43 (1.55-3.82) | 2.27 (1.38-2.73) | 2.41 (1.44-4.02) | |
All | 1,452 | 5,931 | 306 (482) | 516 | ||||
1981-1991 | <40 | 69 | 307 | 16 (17) | 521 | 1.45 (0.80-2.62) | 1.49 (0.82-2.70) | 1.15 (0.62-2.13) |
40-49 | 205 | 946 | 34 (38) | 359 | 1.00 | 1.00 | 1.00 | |
50-59 | 287 | 1,258 | 48 (62) | 382 | 1.06 (0.68-1.65) | 1.30 (0.84-2.03) | 1.33 (0.85-2.09) | |
60-69 | 402 | 1,819 | 55 (74) | 302 | 0.84 (0.55-1.29) | 0.85 (0.55-1.31) | 0.90 (0.58-1.41) | |
70-79 | 342 | 1,389 | 60 (116) | 432 | 1.20 (0.79-1.82) | 0.67 (0.43-1.04) | 0.82 (0.52-1.30) | |
≥80 | 270 | 837 | 57 (177) | 681 | 1.88 (1.23-2.87) | 0.79 (0.50-1.24) | 1.06 (0.65-1.72) | |
All | 1,575 | 6,557 | 270 (484) | 412 |