Table 1.
Number and Percentage of Records Assigned to a CUREd ID at Each Deterministic Entity Resolution Step for Each Source Data Seta
| Number (N) (Column, Percentage) | Source Data Set | All Data Sets | |||
|---|---|---|---|---|---|
| NHS 111 Telephone Helpline | Ambulance Service | Emergency Department | In-Patient Admissions | ||
| Total records | 4,789,273 | 4,382,835 | 9,822,644 | 10,308,510 | 29,303,262 |
| NHS number, date of birth | 4,610,299 (96.3%) | 629,315 (14.4%) | 9,628,629 (98.0%) | 10,274,792 (99.7%) | 25,143,035 (85.8%) |
| Local patient ID and date of birth link to NHS number | 18,153 (0.4%) | N/A (0.0%) | 21,659 (0.2%) | 1079 (<0.1%) | 40,891 (0.1%) |
| Name, sex, date of birth, and postcode link to NHS number | N/A (0.0%) | 688,520 (15.7%) | 3411 (<0.1%) | 785 (<0.1%) | 692,716 (2.4%) |
| Sex, date of birth, and postcode link to NHS number | 22,291 (0.5%) | N/A (0.0%) | 31,756 (0.3%) | 1177 (<0.1%) | 55,224 (0.2%) |
| Clustered | 138,282 (2.9%) | 40,634 (0.9%) | 133,572 (1.4%) | 17,776 (0.2%) | 330,264 (1.1%) |
| No deterministic link/cluster possible | 248 (<0.1%) | 3,024,366 (69.0%) | 3617 (<0.1%) | 12,901 (0.1%) | 3,041,132 (10.4%) |
a
Probabilistic record linkage: ambulance and emergency department/inpatient record. NHS, National Health Service.