| Registry | IARC/IACR rules | SEER rules | Registry‡ | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
First primary cancer | Number with second cancer | SIR (95% CI) | Number with second cancer | SIR (95% CI) | Number with second cancer | SIR (95% CI) | Number with second cancer | SIR‡ (95% CI) | ||||
Lung (C33-34) | 119 | 0.79 | (0.65, 0.94) | 105 | 0.69 | (0.57, 0.84) | 112 | 0.74 | (0.61, 0.89) | 98 | 0.83 | (0.67, 1.01) |
Colorectal (C18-20) | 324 | 0.89 | (0.80, 1.00) | 301 | 0.83 | (0.74, 0.93) | 323 | 0.89 | (0.80, 1.00) | 271 | 0.86 | (0.76, 0.97) |
Female breast (C50) | 363 | 0.96 | (0.86, 1.06) | 272 | 0.71 | (0.63, 0.80) | 348 | 0.92 | (0.82, 1.02) | 274 | 0.96 | (0.85, 1.08) |
 Age <50 | 52 | 2.13 | (1.58, 2.78) | 25 | 1.02 | (0.65, 1.50) | 49 | 2.00 | (1.48, 2.64) | 28 | 1.67 | (1.11, 2.42) |
 Age ≥50 | 311 | 0.88 | (0.78, 0.98) | 247 | 0.69 | (0.61, 0.78) | 299 | 0.84 | (0.75, 0.94) | 246 | 0.92 | (0.81, 1.04) |
Prostate (C61) | 342 | 0.71 | (0.63, 0.79) | 339 | 0.70 | (0.63, 0.78) | 323 | 0.89 | (0.80, 1.00) | 339 | 0.88 | (0.79, 0.98) |
Head & neck (C00-C14, C30-C32) | 204 | 1.93 | (1.67, 2.21) | 196 | 1.85 | (1.60, 2.13) | 201 | 1.90 | (1.64, 2.18) | 176 | 1.74 | (1.49, 2.02) |
Stomach (C16) | 46 | 1.05 | (0.77, 1.40) | 43 | 0.98 | (0.71, 1.32) | 44 | 1.00 | (0.73, 1.35) | 43 | 1.02 | (0.74, 1.38) |
Bladder (C67) | 140 | 1.41 | (1.19, 1.67) | 138 | 1.39 | (1.10, 1.55) | 140 | 1.41 | (1.19, 1.67) | 139 | 1.46 | (1.23, 1.73) |
Oesophagus (C15) | 26 | 0.80 | (0.52, 1.17) | 25 | 0.77 | (0.50, 1.13) | 25 | 0.77 | (0.50, 1.13) | 25 | 0.80 | (0.51, 1.18) |
Melanoma (C43) | 102 | 1.35 | (1.10, 1.64) | 75 | 0.98 | (0.77, 1.23) | 102 | 1.35 | (1.10, 1.64) | 75 | 1.01 | (0.79, 1.27) |
Ovarian (C56) | 19 | 0.61 | (0.36, 0.95) | 18 | 0.58 | (0.34, 0.91) | 19 | 0.61 | (0.37, 0.95) | 18 | 0.60 | (0.36, 0.95) |
All of above | 1685 | 0.96 | (0.91, 1.00) | 1512 | 0.86 | (0.81, 0.90) | 1637 | 1.00 | (0.95, 1.05) | 1458 | 0.99 | (0.94, 1.04) |