Table 2.
Completeness of registration of ACL reconstruction surgery in the DKRR compared with the DNRP
| Type of register
|
Total (n) | Degree of completeness % (95% CI) | |||
|---|---|---|---|---|---|
| Both DNRP and DKRR n (%) | DNRP only n (%) | DKRR only n (%) | |||
| 2005–2011 | 12,963 (71.8) | 3550 (19.7) | 1537 (8.5) | 18,050 | 78.5 (77.9–79.1) |
| ≤20 years | 3449 (76.3) | 773 (17.0) | 299 (6.6) | 4521 | 81.8 (80.6–82.9) |
| >20 years | 9514 (70.3) | 2777 (20.5) | 1238 (9.2) | 13,529 | 77.4 (76.7–78.1) |
| Male | 7783 (71.3) | 2208 (20.2) | 937 (8.6) | 10,928 | 77.9 (77.1–78.7) |
| Female | 5180 (72.7) | 1342 (18.8) | 600 (8.5) | 7122 | 79.4 (78.4–80.4) |
| Small volumea | 1317 (56.0) | 726 (30.8) | 311 (13.2) | 2354 | 64.5 (62.3–66.5) |
| Large volumea | 11,646 (75.1) | 2628 (17.0) | 1226 (7.9) | 15,500 | 81.6 (80.9–82.2) |
| 2005 | 690 (52.2) | 455 (34.5) | 176 (13.3) | 1321 | 60.3 (57.4–63.1) |
| 2006 | 1870 (65.6) | 758 (26.6) | 224 (7.8) | 2852 | 71.2 (69.4–72.9) |
| 2007 | 1828 (67.5) | 660 (24.4) | 219 (8.1) | 2707 | 73.5 (71.7–75.2) |
| 2008 | 1737 (70.7) | 480 (19.9) | 231 (9.4) | 2458 | 78.0 (76.2–79.7) |
| 2009 | 2335 (77.3) | 407 (13.5) | 278 (9.2) | 3020 | 85.2 (83.8–86.5) |
| 2010 | 2323 (77.6) | 433 (14.5) | 238 (7.9) | 2994 | 84.3 (82.9–85.7) |
| 2011 | 2180 (80.8) | 347 (12.9) | 171 (6.3) | 2698 | 86.3 (84.9–87.7) |
Notes: Results were stratified according to patient sex, age, and small-volume versus large-volume hospitals.
a
196 ACL-reconstructed knees that could not be placed in either the small-volume or the large-volume group because of imprecise definition in the DNRP.
Abbreviations: ACL, anterior cruciate ligament; DKRR, Danish Knee Reconstruction Register; DNRP, Danish National Registry of Patients; n, number; CI, confidence interval.