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Table 3 Concordance by subgroups between the official underlying cause of death and the revised underlying cause of death for women diagnosed with breast cancer in Geneva between 1970 and 2009

From: Accuracy of cause of death data routinely recorded in a population-based cancer registry: impact on cause-specific survival and validation using the Geneva cancer registry

  All data Between 0 and 4 years of follow-up Between 5 and 9 years of follow-up Between 10 and 14 years of follow-up
N % Kappa SD N % Kappa SD N % Kappa SD N % Kappa SD
Overall 5,065 100.0 0.82 0.01 2,497 100.0 0.76 0.02 1,275 100.0 0.86 0.03 626 100.0 0.83 0.04
Age at diagnosis
0-49 749 14.8 0.87 0.04 317 12.7 0.76 0.06 210 16.5 0.91 0.07 94 15.0 0.92 0.10
50-59 831 16.4 0.87 0.03 380 15.2 0.79 0.05 210 16.5 0.81 0.07 87 13.9 0.90 0.11
60-69 1,055 20.8 0.82 0.03 442 17.7 0.75 0.05 239 18.7 0.87 0.06 146 23.3 0.76 0.08
70-79 1,317 26.0 0.81 0.03 600 24.0 0.73 0.04 339 26.6 0.82 0.05 237 37.9 0.79 0.06
80+ 1,113 22.0 0.74 0.03 758 30.1 0.71 0.04 277 21.7 0.79 0.06 62 9.9 0.63 0.12
Trend test     p = 0.008     p = 0.394     p = 0.222     p = 0.105
Age at death
0-49 353 7.0 0.80 0.05 248 9.9 0.76 0.06 94 7.4 0.92 0.10 8 1.3 N/A
50-59 593 11.7 0.86 0.04 350 14.0 0.80 0.05 160 12.6 0.88 0.08 64 10.2 0.96 0.12
60-69 813 16.1 0.79 0.04 427 17.1 0.73 0.05 222 17.4 0.83 0.07 87 13.9 0.86 0.11
70-79 1,105 21.8 0.81 0.03 580 23.2 0.73 0.04 270 21.2 0.85 0.06 130 20.8 0.86 0.09
80+ 2,201 43.5 0.77 0.02 892 35.7 0.72 0.03 529 41.5 0.81 0.04 337 53.8 0.73 0.05
Trend test     p = 0.339     p = 0.405     p = 0.256    N/A
Period of diagnosis
1970-79 1,576 31.1 0.80 0.03 695 27.8 0.72 0.04 354 27.8 0.81 0.05 198 31.6 0.75 0.07
1980-89 1,552 30.6 0.80 0.03 686 27.5 0.69 0.04 387 30.5 0.84 0.05 206 32.9 0.82 0.07
1990-99 1,302 25.7 0.86 0.03 654 26.2 0.81 0.04 366 28.7 0.88 0.05 217 34.7 0.91 0.07
2000-09 635 12.5 0.84 0.04 462 18.5 0.81 0.05 168 13.2 0.90 0.07 5 0.8 N/A
Trend test     p = 0.143     p = 0.036     p = 0.229    N/A
Social Class
High 597 11.8 0.81 0.04 281 11.3 0.76 0.06 144 11.3 0.86 0.08 77 12.3 0.77 0.11
Medium 2,171 42.9 0.85 0.02 1,034 41.4 0.78 0.03 553 43.3 0.89 0.04 290 46.3 0.86 0.06
Low 1,484 29.3 0.80 0.03 735 29.4 0.71 0.04 363 28.5 0.82 0.05 177 28.3 0.86 0.07
Unknown 813 16.1 0.79 0.04 447 17.9 0.76 0.05 215 16.9 0.85 0.07 82 13.1 0.73 0.11
Trend testˠ     p = 0.569     p = 0.297     p = 0.492     p = 0.556
Stage
Stage I 1,014 20.0 0.84 0.03 280 11.2 0.78 0.06 305 23.9 0.85 0.06 198 31.6 0.84 0.07
Stage II 2,044 40.4 0.83 0.02 901 36.1 0.77 0.03 564 44.2 0.87 0.04 286 46.7 0.84 0.06
Stage III 807 15.9 0.77 0.04 538 21.6 0.74 0.04 175 13.7 0.80 0.08 58 9.3 0.76 0.13
Stage IV 490 9.7 0.63 0.04 427 17.1 0.55 0.05 50 3.9 0.95 0.14 8 1.3 0.38 0.28
Unknown 710 14.0 0.79 0.04 351 14.1 0.70 0.05 181 14.2 0.82 0.07 76 12.1 0.84 0.11
Trend testˠ     p = 0.000     p = 0.000     p = 0.963     p = 0.272
Treatment
Surgery only 1,252 24.7 0.83 0.03 436 17.5 0.77 0.05 323 25.3 0.85 0.06 216 34.5 0.82 0.07
Surg + adj. 2,693 53.2 0.86 0.02 1,186 47.5 0.82 0.03 766 60.1 0.87 0.04 367 58.6 0.85 0.05
No treatment 421 8.3 0.63 0.05 317 12.7 0.61 0.06 69 5.4 0.79 0.12 23 3.7 0.47 0.21
Hormones 448 8.9 0.73 0.05 345 13.8 0.70 0.05 88 6.9 0.81 0.11 14 2.2 0.86 0.26
Others 251 5.0 0.65 0.06 213 8.5 0.60 0.07 29 2.3 0.87 0.18 6 1.0 0.57 0.37
Sector of care
Private 2,028 40.0 0.86 0.02 870 34.8 0.81 0.03 550 43.1 0.86 0.04 286 45.7 0.87 0.06
Public 3,037 60.0 0.80 0.02 1,627 65.2 0.73 0.02 725 56.9 0.86 0.04 340 54.3 0.79 0.05
Period of death
1970-79 630 12.4 0.70 0.04 548 21.9 0.71 0.04 82 6.4 0.67 0.11 - - N/A
1980-89 1,196 23.6 0.74 0.03 658 26.4 0.68 0.04 362 28.4 0.84 0.05 149 23.8
1990-99 1,483 29.3 0.83 0.03 694 27.8 0.78 0.04 377 29.6 0.87 0.05 211 33.7
2000-09 1,756 34.7 0.88 0.02 597 23.9 0.84 0.05 454 35.6 0.88 0.05 266 42.5
Trend test     p = 0.000     p = 0.007     p = 0.140    N/A
Place of death
Public hospital 2,845 56.2 0.76 0.02 1,573 63.0 0.69 0.03 677 53.1 0.82 0.04 315 50.3 0.78 0.06
Retirement home 1,291 25.5 0.83 0.03 570 22.8 0.77 0.04 328 25.7 0.88 0.06 172 27.5 0.79 0.08
Private hospital 150 3.0 0.85 0.08 55 2.2 0.74 0.13 47 3.7 0.77 0.14 24 3.8 1.00 0.20
Home 374 7.4 0.91 0.05 143 5.7 0.94 0.08 113 8.9 0.87 0.09 54 8.3 0.90 0.14
Others 263 5.2 0.96 0.06 122 4.9 0.96 0.09 70 5.5 0.95 0.12 38 6.1 0.92 0.16
Missing 142 2.8 0.92 0.08 34 1.4 0.94 0.17 40 3.1 0.83 0.16 25 4.0 1.00 0.20
  1. ˠTrend test performed without the missing data.
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