Table 2 Descriptive baseline demographics separated into those who did or did not incur a new ACL injury
Players with ACLR (n = 112) | |||
|---|---|---|---|
Secondary ACL Injury (n = 43) | No Secondary ACL Injury (n = 69) | P | |
Age, years | 20 ± 3 | 20 ± 2 | 0.620 |
Height, cm | 166 ± 5 | 169 ± 5 | 0.034 |
Body mass index, kg/m2 | 22.3 ± 2.3 | 22.6 ± 2.3 | 0.501 |
Graft: all autografts, n (%) | |||
Hamstrings | 41 (95) | 69 (100) | 0.145 |
Patellar tendon | 1 (2) | ||
Quadriceps | 1 (2) | ||
Graft diameter, mm | 8.0 ± 0.6 | 8.0 ± 0.6 | 0.843 |
1. Time between injury and ACLR, months | 3 (4, 0–11) | 4 (5, 0–23) | 0.035 |
2. Level of play after primary ACLR, n (%) | 0.672 | ||
Elite (2 top divisions) | 7 (16) | 7 (10) | |
Third–sixth division | 32 (74) | 54 (78) | |
Lowest division or youth play | 4 (9) | 8 (12) | |
3. IKDC (0–100) | 84 ± 11 | 84 ± 11 | 0.997 |
4. ACL-RSI (0–10) | 6.8 ± 1.8 | 6.8 ± 1.8 | 0.900 |
5. ACL-QoL (0–10) | 7.6 ± 1.5 | 7.6 ± 1.3 | 0.967 |
6. SMPS—personal standards (1–5) | 3.3 ± 0.8 | 3.1 ± 1.0 | 0.184 |
7. SSP—somatic anxiety (0–100) | 53 ± 8 | 51 ± 9 | 0.161 |
8. SSP—psychic anxiety (0–100) | 53 ± 10 | 51 ± 10 | 0.201 |
9. SSP—stress susceptibility (0–100) | 54 ± 10 | 50 ± 10 | 0.073 |
10. SSP—impulsiveness (0–100) | 51 ± 8 | 51 ± 10 | 0.616 |
11. SSP—adventure seeking (0–100) | 53 ± 7 | 55 ± 9 | 0.391 |
12. Ankle dorsiflexion, side difference, degrees | 0 ± 2.2 | 0 ± 1.9 | 0.607 |
13. Knee extension ACLR leg, degreesa | − 7 ± 4 | − 4 ± 6 | 0.011 |
14. LSI—single hop for distance, % | 98 ± 9 | 98 ± 8 | 0.754 |
15. LSI—side hop, % | 98 ± 18 | 91 ± 23 | 0.093 |
16. 5-jump test, cm | 900 ± 111 | 869 ± 89 | 0.102 |
17. Tuck jump total points (0–10) | 5 ± 2 | 5 ± 2 | 0.201 |
18. Knee collapse ACLR leg in DVJ, cm | 2.8 (6, − 4.4 to 10.7) | 2.4 (4, − 7.9 to 9.3) | 0.405 |
19. Knee collapse non-ACLR leg in DVJ, cm | 4.4 (5, − 4.1 to 9.4) | 3.4 (6, − 10.0 to 10.9) | 0.167 |