TABLE I.
Baseline Demographic Data
| Total (N = 18,425) | Patellar Tendon Autograft (N = 1,329) | Hamstring Tendon Autograft (N = 17,096) | |
| Sex* (derived) | |||
| Male | 10,532 (57.2%) | 769 (57.9%) | 9,763 (57.1%) |
| Female | 7,893 (42.8%) | 560 (42.1%) | 7,333 (42.9%) |
| Age | |||
| At index ACL injury | |||
| No. of patients | 13,471 | 273 | 13,198 |
| Mean† (yr) | 24.9 ± 9.3 | 25.0 ± 8.8 | 24.9 ± 9.3 |
| Median‡ (yr) | 22.1 (6.3 to 58.9) | 22.7 (13.7 to 50.8) | 22.1 (6.3 to 58.9) |
| Interquartile range (yr) | 17.8, 29.8 | 17.9, 29.4 | 17.8, 29.8 |
| At index ACL reconstruction | |||
| No. of patients | 18,425 | 1,329 | 17,096 |
| Mean† (yr) | 26.8 ± 9.7 | 25.8 ± 8.8 | 24.9 ± 9.3 |
| Median‡ (yr) | 23.9 (13.0 to 59.9) | 22.6 (13.5 to 59.3) | 24.1 (13.0 to 59.9) |
| Interquartile range (yr) | 19.0, 33.0 | 18.5, 30.7 | 19.0, 33.2 |
| Adolescents§ | 5,663 (30.7%) | 474 (35.7%) | 5,189 (30.4%) |
| Duration of surgery | |||
| No. of patients | 14,378 | 304 | 14,074 |
| Mean† (min) | 74.4 ± 24.0 | 82.3 ± 27.5 | 74.2 ± 23.9 |
| Median‡ (min) | 70.0 (25.0 to 304.0) | 75.0 (40.0 to 184.0) | 70.0 (25.0 to 304.0) |
| Interquartile range (min) | 57.0, 90.0 | 62.5, 95.5 | 56.0, 90.0 |
| Time to surgical procedure | |||
| No. of patients | 16,774 | 1,242 | 15,532 |
| Mean† (mo) | 16.4 ± 29.8 | 14.3 ± 25.8 | 16.6 ± 30.1 |
| Median‡ (mo) | 8.0 (0.0 to 468.0) | 7.0 (0.0 to 367.0) | 8.0 (0.0 to 468.0) |
| Interquartile range (mo) | 5.0, 15.0 | 4.0, 13.0 | 5.0, 15.0 |
| Meniscal injury* | 8,656 (47.0%) | 695 (52.3%) | 7,961 (46.6%) |
| Cartilage injury* | 4,532 (24.6%) | 230 (17.3%) | 4,302 (25.2%) |
| Femoral fixation* # | |||
| Cortical fixation | 12,275 (66.9%) | 169 (12.8%) | 12,106 (71.0%) |
| RIGIDFIX Cross Pin | 2,874 (15.7%) | 51 (3.9%) | 2,823 (16.6%) |
| Metal interference screw | 2,913 (15.9%) | 885 (67.0%) | 2,028 (11.9%) |
| Bioabsorbable interference screw | 217 (1.2%) | 204 (15.5%) | 13 (0.1%) |
| Not classified | 81 (0.4%) | 11 (0.8%) | 70 (0.4%) |
| Missing | 65 | 9 | 56 |
| Tibial fixation* # | |||
| Cortical fixation | 954 (5.2%) | 14 (1.1%) | 940 (5.5%) |
| Post fixation | 1,253 (6.8%) | 5 (0.4%) | 1,248 (7.3%) |
| RIGIDFIX Cross Pin | 309 (1.7%) | 4 (0.3%) | 305 (1.8%) |
| Metal interference screw | 7,999 (43.4%) | 1,035 (77.9%) | 6,964 (40.7%) |
| Bioabsorbable interference screw | 7,697 (41.8%) | 249 (18.7%) | 7,448 (43.6%) |
| Not classified | 127 (0.7%) | 18 (1.4%) | 109 (0.6%) |
| Missing | 86 | 4 | 82 |
| Revision within 2 years** | |||
| Total | 391 (2.1%) | 35 (9.0%) | 356 (91.0%) |
| Male | 206 (1.1%) | 20 (9.7%) | 186 (90.3%) |
| Female | 185 (1.0%) | 15 (8.1%) | 170 (91.9%) |
*
The values are given as the number of patients, with the percentage in parentheses.
†
The values are given as the mean and the standard deviation.
‡
The values are given as the median, with the range in parentheses.
§
Adolescents are 13 to 19 years of age.
#
The percentages in this section were based on the number of patients with available data.
**
The values are given as the number of patients, with the row percentage in parentheses for the subgroups.