Factors Related to Return to Sport at One Year after Anterior Cruciate Ligament Reconstruction
Keywords:anterior cruciate ligament reconstruction, rehabilitation, return to sport, single leg hop test
Objectives: To investigate rates of return to pre-injury sport (RTS) level at around one year after anterior cruciate ligament reconstruction (ACLR) and completing a rehabilitation program for post-ACLR and related factors.
Study design: Retrospective case control study.
Setting: Department Rehabilitation Medicine, Suratthani Hospital.
Subjects: Patients who underwent ACLR and completed the rehabilitation program, had a pre-injury Tegner Activity Scale (TAS) level 5 or higher, had normal Lachman test, and 4 single leg hop tests done.
Methods: Demographic data and results of 4 single leg hop tests were extracted from the recruited patients’ medical records. Limb symmetry index (LSI) was calculated from the 4 single leg hop tests. The recruited patients were divided into two groups, the RTS and the non-RTS groups, and data were compared between the two groups.
Results: There were 40 patients in the RTS group and 31 in the non-RTS group. The RTS rates were 56.3% in average, 57.4% for football, 62.5% for running, and 16.7% for basketball. The RTS group had younger age (mean age of 23.5 and 29.0 years, p = 0.01), more athletes (37.5% and 12.9%, p = 0.03), higher percentage of LSI > 90% of all 4 single leg hop tests (77.5% and 29.0%, p = 0.00) than the non-RTS group. Mean duration from operation to the last 4 single leg hop tests was 10.4 months for the RTS group. One reason of being unable to RTS was fear of re-injury (67.7%).
Conclusion: The overall rate of return to pre-injury sport level was 56.3%. Younger age and achieving LSI more than 90% of all 4 single leg hop tests were factors related to RTS at around one year after ACLR and receiving postoperative rehabilitation. Fear of re-injury was a major reason for not returning to pre-injury sports activity.
Keywords: anterior cruciate ligament reconstruction, rehabilitation, return to sport, single leg hop test
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