Purpose

To determine if postoperative patient-reported outcome measures (PROMs) are influenced by hip arthroscopy traction duration.

Methods

A total of 3,528 patients from a local prospective hip arthroscopy database were retrospectively analyzed. Four hip specific PROMs were utilized: modified Harris Hip Score (mHHS), Hip-Outcome Score – Activities of Daily Living (HOS-ADL), Hip Outcome Score – Sports Specific (HOS-SS), and the international Hip Outcome Tool (iHOT). PROMs were collected preoperatively and six months, one year, and two years postoperatively. Two cohorts were created based on a cut-off of intraoperative traction time of 50 minutes, which corresponds to a 66th percentile for our patient cohort. Analyses were completed for each PROM at each post-operative interval with univariable statistics. Multivariable statistics was examined for all patients to identify variables that were predictive of achieving post-operative minimal clinically important difference (MCID) at 2 year follow-up.

Results

Overall, 222 patients met the inclusion criteria. Mean age was 32.4 ± 9.4 years and 116 (52.3%) were female. The average traction time of the study population was 46.1 ± 12.9 minutes. 145 patients were included in the short traction cohort (65%) with traction times below the 66th percentile (<50 minutes), 77 patients were included in the long traction cohort (35%). No significant differences were found regarding PROM scores or MCID achievement rate between both cohorts at any post-operative period. In multivariable analyses, achievement of MCID was predicted by a decrease in traction time for all PROMs and pincer-type resection for mHSS, HOS-ADL and iHOT.

Conclusion

There was no difference in PROMs and MCID achievement between longer and shorter traction time cohorts. On multivariable analysis, a decrease in traction time is predictive of MCID for all PROM scores and pincer type resection was predictive of MCID for most PROM scores

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