Metal interference screw fixation combinations show high revision rates in primary hamstring tendon ACL reconstruction

Table 2 Baseline characteristics of the study cohort

Variable	Total (n = 23,238)
Age at time of surgery (years), mean + SD, median (min-max)	27.3 + 10.4 25 (13–67)
BMI (kg/m²), mean + SD, median (min-max)	24.5 + 3.3 24.2 (15.4–49.8)
Sex (male), n (%)	13,087 (56.3)
Activity at time of injury, n (%)
Alpine/skiing	3439 (14.8)
Pivoting sport	15,491 (66.7)
Non-pivoting sport	972 (4.2)
Other physical activity	890 (3.8)
Traffic related	357 (1.5)
Other	2083 (9.0)
Concomitant meniscus injury (yes), n (%)
Lateral meniscus injury	5825 (25.1)
Medial meniscus injury	6201 (26.7)
Concomitant cartilage injury (yes), n (%)	5574 (24.0)
Lateral femoral condyle	1114 (4.7)
Medial femoral condyle	3889 (16.7)
Lateral patella	541 (2.3)
Medial patella	945 (4.1)
Lateral tibial plateau	1307 (5.6)
Medial tibial plateau	1009 (4.3)
Trochlea	647 (2.8)
Time from injury to surgery (months), mean + SD, median (min-max)	19.1 + 33.7 7.9 (0–551)
Revision, n (%)	584 (2.5)

BMI body mass index; min-max minimum-maximum; SD standard deviation; Pivoting sport (American football/rugby, basketball, dancing, floorball, gymnastics, handball, ice hockey/bandy, martial arts, racket sports, soccer, volleyball, wrestling); non-pivoting sport (Cross-country skiing, cycling, horseback riding, motocross/endure, skateboarding, snowboarding, and surfing/wakeboarding); other physical activity (other recreational sport, exercise, trampoline); other (other, outdoor activity and work)
The sums may vary due to missing data n (%): BMI 9725 (41.8), Activity at time of injury 6 (0.03); Details on the location of concomitant cartilage injury 17,695 (76.1); Time from injury to surgery 378 (1.6)

ISSN: 1471-2474