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Psychological readiness at 9 months after anterior cruciate ligament reconstruction -which factors affect?
Makoto Suzuki1, Tomoya Ishida1, Hisashi Matsumoto2
1Faculty of Health Sciences, Hokkaido University, Sapporo, Japan; Department of Rehabilitation, Hokushin Orthopaedic Hospital, Sapporo, Japan.
Objective:
To investigate the association of psychological readiness at 9 months after anterior cruciate ligament reconstruction (ACLR) with knee strength and range-of-motion (ROM) at 3 and 9 months postoperatively.
Design:
Retrospective cohort study.
Setting:
Private orthopedic hospital.
Participants:
Seventy-eight patients after ACLR.
Main Outcomes Measures:
The participants completed the anterior cruciate ligament-return to sport after injury (ACL-RSI) scale as an assessment of psychological readiness at 9 months after ACLR. Isometric and isokinetic quadriceps and hamstring strength were measured by a dynamometer at 3 and 9 months postoperatively. Knee extension and flexion ROM were measured in 5° increments with a standard goniometer at 3 and 9 months postoperatively.
Results:
Univariate regression analysis showed that age, limb symmetry index (LSI) of quadriceps strength at 3 and 9 months, and knee extension ROM deficit (>5°) at 3 and 9 months were associated with ACL-RSI scores at 9 months (P < 0.05). Age and LSI of quadriceps strength at 3 months remained significant predictors of ACL-RSI scores at 9 months in multiple regression analysis (R2 = 0.20, P < 0.001).
Conclusions:
Early improvements in quadriceps strength after ACLR may have a positive impact on psychological readiness at 9 months postoperatively.
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