Results of record linking between the electronic health records and the Netherlands Cancer Registry
| Total cancers JGPN | Total cancers NCR | Number matching | Proportion matching | Number false positives | Proportion false positives | Number false negatives | Proportion false negatives | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| n | m | N | N/m (%) | 95% CI | M | M/n (%) | 95% CI | K | K/m (%) | 95% CI | |
| Four types combined | 3364 | 2839 | 1720 | 60.6 | (58.8 to 62.4) | 1644 | 48.9 | (47.2 to 50.6) | 1119 | 39.4 | (37.6 to 41.2) |
| Age <50 | 451 | 412 | 246 | 59.7 | (55.0 to 64.4) | 205 | 45.5 | (40.9 to 50.1) | 166 | 40.3 | (35.5 to 45.0) |
| Age 50–75 | 2109 | 1824 | 1139 | 62.4 | (60.2 to 64.7) | 970 | 46.0 | (43.9 to 48.1) | 685 | 37.6 | (35.3 to 39.8) |
| Age >75 | 804 | 603 | 335 | 55.6 | (51.6 to 59.5) | 469 | 58.3 | (54.9 to 61.7) | 268 | 44.4 | (40.5 to 48.4) |
| EHR system | |||||||||||
| Promedico | 2068 | x | 925 | 44.7 | 1143 | 55.3 | (53.1 to 57.4) | x | |||
| Medicom | 468 | x | 261 | 55.8 | 207 | 44.2 | (39.7 to 48.7) | x | |||
| MicroHis | 828 | x | 534 | 64.5 | 294 | 35.5 | (32.2 to 38.8) | x | |||
| Cancer type | |||||||||||
| Breast cancer | 1144 | 1008 | 622 | 61.7 | (58.7 to 64.7) | 522 | 45.6 | (42.7 to 48.5) | 386 | 38.3 | (35.3 to 41.3) |
| Age <50 | 290 | 267 | 156 | 58.4 | (52.5 to 64.3) | 134 | 46.2 | (40.5 to 51.9) | 111 | 41.6 | (35.7 to 47.5) |
| Age 50–75 | 681 | 598 | 381 | 63.7 | (59.7 to 67.6) | 300 | 44.1 | (40.3 to 47.8) | 217 | 36.3 | (32.4 to 40.1) |
| Age >75 | 173 | 143 | 85 | 59.4 | (51.4 to 67.5) | 88 | 50.9 | (43.4 to 58.3) | 58 | 40.6 | (32.5 to 48.6) |
| Prostate cancer | 662 | 547 | 336 | 61.4 | (57.3 to 65.5) | 326 | 49.2 | (45.4 to 53.1) | 211 | 38.6 | (34.5 to 42.7) |
| Age <50 | 6 | 5 | 4 | 80.0 | (44.9 to 115.1) | 2 | 33.3 | (−4.4 to 71.1) | 1 | 20.0 | (−15.1 to 55.1) |
| Age 50–75 | 469 | 425 | 270 | 63.5 | (59.0 to 68.1) | 199 | 42.4 | (38.0 to 46.9) | 155 | 36.5 | (31.9 to 41.0) |
| Age >75 | 187 | 117 | 62 | 53.0 | (43.9 to 62.0) | 125 | 66.8 | (60.1 to 73.6) | 55 | 47.0 | (38.0 to 56.1) |
| Lung cancer | 731 | 600 | 331 | 55.2 | (51.2 to 59.1) | 400 | 54.7 | (51.1 to 58.3) | 269 | 44.8 | (40.9 to 48.8) |
| Age <50 | 46 | 36 | 18 | 50.0 | (33.7 to 66.3) | 28 | 60.9 | (46.8 to 75.0) | 18 | 50.0 | (33.7 to 66.3) |
| Age 50–75 | 492 | 438 | 248 | 56.6 | (52.0 to 61.3) | 244 | 49.6 | (45.2 to 54.0) | 190 | 43.4 | (38.7 to 48.0) |
| Age >75 | 193 | 126 | 65 | 51.6 | (42.9 to 60.3) | 128 | 66.3 | (59.7 to 73.0) | 61 | 48.4 | (39.7 to 57.1) |
| Colon cancer | 827 | 684 | 431 | 63.0 | (59.4 to 66.6) | 396 | 47.9 | (44.5 to 51.3) | 253 | 37.0 | (33.4 to 40.6) |
| Age <50 | 74 | 58 | 43 | 74.1 | (62.9 to 85.4) | 31 | 41.9 | (30.7 to 53.1) | 15 | 25.9 | (14.6 to 37.1) |
| Age 50–70 | 502 | 409 | 265 | 64.8 | (60.2 to 69.4) | 237 | 47.2 | (42.8 to 51.6) | 144 | 35.2 | (30.6 to 39.8) |
| Age >75 | 251 | 217 | 123 | 56.7 | (50.1 to 63.3) | 128 | 51.0 | (44.8 to 57.2) | 94 | 43.3 | (36.7 to 49.9) |
JGPN, Julius General Practitioners’ Network; NCR, Netherlands Cancer Registry.