Table 1 Number (%) of patients in HES who completed pre-operative questionnaires who were ineligible, of uncertain eligibility and were eligible for inclusion; and impact on estimated recruitment rate
Hip replacements | Knee replacements | Groin hernia repair | VV surgery | |
|---|---|---|---|---|
No patients in HES | 66 598 | 74 827 | 68 886 | 34 909 |
No patients who completed pre-operative questionnaires | 52 183 | 60 621 | 37 713 | 15 588 |
No (%) of patients who completed questionnaires of uncertain eligibility | 6 231 (11.9) | 7 366 (12.2) | 7 161 (19.0) | 1 530 ( 9.8) |
No hospital episode | 4 771 (9.1) | 5 704 (9.4) | 6 006 (15.9) | 1 085 (7.0) |
No HES_ID | 1 460 (2.8) | 1 662 (2.8) | 1 155 (3.1) | 445 (2.8) |
No (%) of patients who completed questionnaires who were ineligible | 3 472 ( 6.7) | 6 466 (10.7) | 2 041 ( 5.4) | 682 ( 4.4) |
Operation cancelled | 1 236 (2.4) | 2 185 (3.6) | 786 (2.1) | 302 (1.9) |
Duplicate questionnaire | 185 (0.4) | 65 (0.1) | 139 (0.4) | 96 (0.6) |
Ineligible procedure | 2051 (3.9) | 4216 (7.0) | 1116 (3.0) | 284 (1.9) |
No (%) of patients who completed questionnaires who were eligible | 42 480 (81.4) | 46 879 (77.3) | 28 515 (75.6) | 13 376 (85.8) |
National recruitment proportion: | ||||
Official (No of completed questionnaires/No patients in HES) | 78.4 | 81.0 | 54.7 | 44.7 |
Best estimate (excluding ineligible) | 73.1 | 72.4 | 51.8 | 42.7 |
Conservative estimate (excluding ineligible & uncertain eligible) | 63.8 | 62.6 | 41.4 | 38.3 |