Department of Orthopedic Surgery, Tokyo Women's Medical University, Tokyo, Japan.
J Arthroplasty. 2021 Aug;36(8):2691-2697. doi: 10.1016/j.arth.2021.03.028. Epub 2021 Mar 13.
The Forgotten Joint Score-12 (FJS-12) was originally developed to assess awareness of an artificial joint. Medial opening wedge high tibial osteotomy (MOWHTO), an alternative surgical method of knee replacement, is a joint-preservation surgery; therefore, joint awareness should be used to evaluate its clinical results. However, FJS-12 has not been validated as a tool to evaluate the postoperative results of MOWHTO. This study aimed to validate FJS-12 in MOWHTO.
Patients with bilateral knee surgery, previous knee surgery, flexion contracture >15°, varus alignment >20°, and patients without plate removal surgery were excluded. Finally, 71 knees of 71 patients were analyzed, with a mean follow-up of 34.5 months. The FJS-12 score and Knee Injury and Osteoarthritis Outcome Score (KOOS) were obtained, and the floor and ceiling effect of each score was investigated. Cronbach's α was calculated to determine the internal consistency of FJS-12. Spearman's correlation coefficients between FJS-12 and KOOS were calculated to assess convergent validity.
There were ceiling effects in 3 KOOS subscales (symptoms [25.4%], pain [15.5%], and activities of daily living [25.4%]) but not in FJS-12 (8.5%). No floor effect was noted in any patient-reported outcome measures. The total Cronbach's α was 0.9457 in FJS-12. FJS-12 showed moderate-to-strong positive correlations with all KOOS subscales (r = 0.64-0.72).
FJS-12 showed a lower ceiling effect than KOOS and high internal consistency and convergent validity in patients following MOWHTO. With its low ceiling effect, FJS-12 was found to be useful for evaluating patients following MOWHTO.
最初开发遗忘关节评分-12 （FJS-12）是为了评估人工关节的意识。内侧开口楔形胫骨高位截骨术（MOWHTO），一种膝关节置换的替代手术方法，是一种保留关节的手术；因此，应该使用关节意识来评估其临床结果。然而，FJS-12 尚未被验证为评估 MOWHTO 术后结果的工具。本研究旨在验证 MOWHTO 中的 FJS-12。
排除双侧膝关节手术、既往膝关节手术、屈曲挛缩> 15°、内翻畸形> 20°和未行钢板取出手术的患者。最终，分析了 71 例患者的 71 个膝关节，平均随访 34.5 个月。获得 FJS-12 评分和膝关节损伤和骨关节炎结果评分（KOOS），并研究了每个评分的地板和天花板效应。计算 FJS-12 的 Cronbach's α 以确定内部一致性。计算 FJS-12 与 KOOS 之间的 Spearman 相关系数以评估收敛有效性。
在 3 个 KOOS 亚组（症状[25.4%]、疼痛[15.5%]和日常生活活动[25.4%]）中存在天花板效应，但在 FJS-12 中没有（8.5%）。在任何患者报告的结果测量中都没有地板效应。FJS-12 的总 Cronbach's α 为 0.9457。FJS-12 与所有 KOOS 亚组均显示出中度至强的正相关（r = 0.64-0.72）。
与 KOOS 相比，FJS-12 的天花板效应较低，在 MOWHTO 后患者中具有较高的内部一致性和收敛有效性。由于其较低的天花板效应，FJS-12 被发现对评估 MOWHTO 后患者有用。
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