Patient activity level may not affect implant survivorship after THA, TKA
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Key takeaways:
- Patients with high vs. low activity levels had similar outcomes after THA and TKA.
- Both cohorts had similar rates of revisions, reoperations and 5-year implant survivorship.
Patients with high vs. low activity levels had similar outcomes and implant survivorship after total hip and total knee arthroplasty, according to published results.
Hayley E. Ennis, MD, and colleagues performed a retrospective cohort study of data from 96 patients who underwent primary THA and 298 patients who underwent primary TKA between April 6, 2009, and Dec. 14, 2015, with mean follow-up of 8.2 years.
According to the study, researchers used University of California Los Angeles activity level scores to categorize patients into 1:1 matched cohorts of high activity ( score of 8 or greater) or low activity (score of less than 8). Outcome measures included complications, revisions, reoperations and implant survivorship. Researchers also analyzed radiographs to assess migration, wear, osteolysis, stress shielding and subsidence.
Overall, researchers found the high activity and low activity cohorts had similar rates of revisions, reoperations and 5-year implant survivorship. They noted crepitus was the most common complication among patients who underwent TKA in both the high activity (n = 8) and low activity (n = 6) cohorts. They noted complications were rare among patients who underwent THA.
In addition, researchers found no significant differences in radiographic outcomes for the high activity or low activity cohorts among patients who underwent TKA. However, they noted the low activity cohort had significantly more radiographic abnormalities compared with the high activity cohort among patients who underwent THA.
Ennis and colleagues concluded this research could change how surgeons recommend activity after total joint arthroplasty. They noted future research could assess patient activity levels with wearable or implantable technology.
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