Skip to main content

Table 4 Age at diagnosis in relation to breast cancer-specific mortality with stratification for diagnostic period; five-year follow-up period

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    
  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 BMI, parity, tumor size, axillary lymph node status, histological type, tumor location, and distant metastasis.