Background: The Forgotten Joint Score (FJS) is a newly developed patient-reported outcome measure designed to evaluate clinical outcome after total knee arthroplasty (TKA). The FJS is known as a sensitive test with a low ceiling effect. It has been recently translated into many languages. However, no study has reported the validity or reliability of a Korean version of the FJS (K-FJS). Thus, the purpose of this study was to address this issue. Methods: According to guidelines for cross-cultural adaptation, translation of the English version of the FJS was performed. After obtaining a license from the original developer, 150 patients who had undergone TKA at more than 1 year to less than 5 years ago completed the K-FJS, visual analog scale, Western Ontario and McMaster Universities Osteoarthritis index (WOMAC), and the 36-Item Short Form (SF-36) health survey. To measure test-retest reliability, the K-FJS was completed twice by telephone survey for 100 patients. Responsiveness was retrospectively calculated based on a survey of 50 patients at 3 months and 1 year after surgery. Results: The K-FJS exhibited an excellent reliability (Cronbach's α, 0.967; intraclass correlation coefficient, 0.958; 95% confidence interval, 0.930–0.974). The ceiling effect of the K-FJS was 8.7% (n = 13), which was lower than the WOMAC's ceiling effect (10%).There was no floor effect. The correlation coefficients with WOMAC and SF-36 (physical function) were 0.708 and 0.682, respectively, indicating good construct validity. However, its correlation with mental health subscale of SF-36 was low (r = 0.143). At 3 to 12 months after TKA, the standardized response mean (SRM) was 0.67, which was lower than the SRM of WOMAC (1.03) obtained in the same period. The K-FJS demonstrated strong measurement properties in terms of good construct validity and reliability. Conclusions This study suggests that the K-FJS is an excellent instrument that can be used to monitor clinical outcomes after TKA. Using this standardized K-FJS, it would be possible for medical institutions to share more accurate clinical results.

STUDY DESIGN: Retrospective study. OBJECTIVES: To compare the radiologic results of unilateral or bilateral minimal invasive transforaminal lumbar interbody fusion (MIS TLIF) and conventional open lumbar interbody fusion. SUMMARY OF LITERATURE REVIEW: Only a few studies have compared the slip reduction and fusion rate between unilateral or bilateral MIS TLIF and conventional open TLIF. MATERIALS AND METHODS: Between March 2007 and May 2015, 80 patients with single-level low-grade spondylolisthesis underwent unilateral MIS TLIF (26 patients), bilateral MIS TLIF (10 patients), or open TLIF (44 patients) by a single surgeon. Radiologic studies were performed preoperatively, 2 weeks postoperatively, and 12 months postoperatively. Slip reduction, the lumbar lordortic angle, and the fusion rate were analyzed. RESULTS: The 3 groups exhibited significantly improved slip after operation. Significant differences were found among the 3 groups (p=0.015) and between the MIS TLIF group (31.76%±14.42%) and the open TLIF group (41.66%±15.98%) (p=0.01) in the slip reduction rate at 2 weeks after the operation. However, no significant difference was found between unilateral MIS TLIF and bilateral MIS TLIF (37.61%±15.0% vs. 29.5%±13.82%, p=0.148). In the lumbar lordotic angle, no significant difference was found among the 3 groups. There were no significant differences among the 3 groups in slip reduction or the fusion rate at 12 months after the operation. CONCLUSIONS: Our study suggests that unilateral MIS TLIF showed a similar slip reduction and fusion rate to bilateral MIS TLIF, but that conventional open TLIF showed better slip reduction than MIS TLIF, although it had a similar fusion rate.
Humans ; Retrospective Studies ; Spondylolisthesis*