Table 2.
Baseline demographics and surgical characteristics of the study groups: double-bundle (DB) hamstring tendon (HT), single-bundle HT (SBHT), and single-bundle bone-pateller tendon-bone (BPTB) group
| Demographics and surgical characteristics | Double-bundle HT (n = 994) | Single-bundle HT (n = 51,991) | p value (DB versus SBHT) | Single-bundle BPTB (n = 7790) | p value (DB versus SBPT) |
|---|---|---|---|---|---|
| Age (years), number (%) | |||||
| 15–19 | 232 (23.3) | 12,751 (24.5) | 1748 (22.4) | ||
| 20–24 | 222 (22.3) | 10,891 (20.9) | 1532 (19.7) | ||
| 25–29 | 154 (15.5) | 7895(15.2) | 1231 (15.8) | ||
| 30+ | 386 (38.8) | 20,454 (39.3) | 3279 (42.1) | ||
| Mean age (years) ± SD | 28.0 ± 9.59 | 28.2 ± 10.07 | 0.45† | 28.8 ± 10.06 | 0.02 † |
| Sex, number (% male) | 635 (63.9) | 30,257 (58.2) | <0.001 * | 4866 (62.5) | 0.38* |
| Side, number (% right) | 519 (52.2) | 26,628 (51.2) | 0.54* | 4019 (51.6) | 0.71* |
| Meniscal injury, number (% yes) | 478 (48.1) | 23,166 (44.6) | 0.27* | 3549 (45.6) | 0.13* |
| Chondral injury, number (% yes) | 275 (27.7) | 11,252 (21.6) | <0.001 * | 1561 (20.0) | <0.001 * |
| Time from surgery to revision (months) | |||||
| Mean ± SD | 31.75 ± 17.95 | 27.62 ± 18.83 | <0.001 † | 35.02 ± 21.14 | <0.001 † |
| Median | 27 | 22 | 30 | ||
| Fixation femur, number (%) (n = 60,515, missing n = 263) | |||||
| Metal screw (n = 9788) | 220 (22.1) | 3118 (6.0) | 6450 (82.8) | ||
| Bioscrew (n = 766) | 15 (1.5) | 570 (1.1) | 181 (2.3) | ||
| Button (n = 24,872) | 357 (35.9) | 24,306 (46.8) | 209 (2.7) | ||
| Other (n = 25,089) | 399 (40.1) | 23,759 (45.7) | 931 (12.0) | ||
| Fixation tibia, number (%) (n = 60,331, missing n = 447) | |||||
| Metal screw (n = 17,564) | 258 (26.0) | 11,122 (21.4) | 6184 (79.4) | ||
| Bioscrew (n = 10,859) | 400 (40.2) | 10,206 (19.6) | 253 (3.2) | ||
| Button (n = 1035) | 9 (0.9) | 1025 (2.0) | 1 (0.0) | ||
| Other (n = 30,873) | 306 (30.8) | 29,233 (56.2) | 1334 (17.1) | ||
Bold values indicate statistical significance (p < 0.05)
*Pearson’s chi-square test; † independent samples t-test; NS = nonsignificant.