Table 2.
Patient Characteristics for Screw-Related Symptoms Requiring Screw Removal Surgery and for Any Screw-Related Symptomsa
| Screw Removal | Any Screw-Related Symptoms | ||||
|---|---|---|---|---|---|
| Characteristic | Total | n (%) | P | n (%) | P |
| All | 925 | 45 (4.9) | 89 (9.6) | ||
| Demographics | |||||
| Year of ACLR | .81 | .61 | |||
| 2000-2004 | 189 | 11 (5.8) | 17 (9.0) | ||
| 2005-2008 | 377 | 17 (4.5) | 33 (8.8) | ||
| 2009-2011 | 359 | 17 (4.7) | 39 (10.9) | ||
| Side Left | 446 | 13 (2.9) | .009 | 35 (7.8) | .09 |
| Right | 479 | 32 (6.7) | 54 (11.3) | ||
| Sex | .04 | .29 | |||
| Male | 319 | 9 (2.8) | 26 (8.2) | ||
| Female | 606 | 36 (5.9) | 63 (10.4) | ||
| Patient age at ACLR, y | .44 | .53 | |||
| 10-13 | 135 | 4 (3.0) | 10 (7.4) | ||
| 14-16 | 576 | 28 (4.9) | 55 (9.5) | ||
| 17-18 | 214 | 13 (6.1) | 24 (11.2) | ||
| ACLR procedure details | |||||
| Surgeon volumeb | .23 | .01 | |||
| High | 817 | 37 (4.5) | 71 (8.7) | ||
| Low | 108 | 8 (7.4) | 18 (16.7) | ||
| Graft type | .94 | .68 | |||
| Autograft hamstring | 671 | 33 (4.9) | 65 (9.7) | ||
| Autograft BTB | 158 | 7 (4.4) | 13 (8.2) | ||
| Cadaver | 96 | 5 (5.2) | 11 (11.5) | ||
| Revision surgery | .07 | .24 | |||
| No | 892 | 41 (4.6) | 84 (9.4) | ||
| Yes | 33 | 4 (12.1) | 5 (15.2) | ||
| Screw type: name (composition) | .36 | .16 | |||
| BIO-RCI (PLLA-HA) | 838 | 40 (4.8) | 79 (9.4) | ||
| Delta tapered or rounded (PLLA) | 43 | 2 (4.7) | 7 (16.3) | ||
| Calaxo (PDLG 65%, CC 35%) | 5 | 1 (20.0) | 1 (20.0) | ||
| Others (mostly PLLA) | 33 | 1 (3.0) | 1 (3.0) | ||
| Associated procedures | |||||
| Meniscal procedures | .43 | .93 | |||
| None | 396 | 19 (4.8) | 39 (9.8) | ||
| Meniscectomy only | 200 | 13 (6.5) | 20 (10.0) | ||
| Repair ± meniscectomy | 329 | 13 (4.0) | 30 (9.1) | ||
| Chondroplasty | .17 | .15 | |||
| No | 872 | 40 (4.6) | 81 (9.3) | ||
| Yes | 53 | 5 (9.4) | 8 (15.1) | ||
| Other ligament injury or repairc | ≥.999 | ≥.999 | |||
| No | 911 | 45 (4.9) | 88 (9.7) | ||
| Yes | 14 | 0 (0.0) | 1 (7.1) | ||
| Any other procedure | .38 | .17 | |||
| No | 898 | 43 (4.8) | 84 (9.4) | ||
| Yes | 27 | 2 (7.4) | 5 (18.5) | ||
aACLR, anterior cruciate ligament reconstruction; BTB, bone–patellar tendon–bone; CC, calcium carbonate; HA, hydroxyapatite; PDLG, poly-d,l-lactide-co-glycolide; PLLA, poly-l-lactic acid.
bThree surgeons performed 157-441 surgeries each. Four surgeons performed 8-51 each.
cMedial collateral ligament, posterior cruciate ligament, lateral collateral ligament, and posterolateral corner repair.