Percentage of all repeated requests within specified time frame for tumour markers over a 12 month period
| Same day | 1 week | 4 weeks | 12 weeks | 26 weeks | 52 weeks | Total* | No. of annual requests | |
|---|---|---|---|---|---|---|---|---|
| AFP, α fetoprotein; CEA, carcinoembryonic antigen; PSA, prostate specific antigen. | ||||||||
| *Percentage of annual request in parenthesis. | ||||||||
| AFP | 0.6 | 5.3 | 23.0 | 50.4 | 80.8 | 100 | 10217 (42.4) | 24072 |
| CEA (colon cancer) | 0.3 | 2.7 | 11.5 | 45.1 | 86.9 | 100 | 3808 (35.0) | 10875 |
| CEA (breast cancer) | 0.5 | 1.2 | 7.6 | 36.6 | 87.5 | 100 | 1286 (23.6) | 5438 |
| CA15.3 | 0.1 | 1.1 | 16.6 | 53.0 | 88.7 | 100 | 2559 (55.8) | 4582 |
| PSA | 0.7 | 2.8 | 17.9 | 24.0 | 86.4 | 100 | 1232 (38.0) | 3244 |