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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    
  1. CI = Confidence Intervals.
  2. aBreast cancer-specific mortality per 10,000 person-years.
  3. bAdjusted for tumor size, axillary lymph node status, and distant metastasis.
  4. cAdjusted for diagnostic period, BMI, parity, tumor size, axillary lymph node status, histological type, tumor location, and distant metastasis.