Validity and Reliability of the American Orthopaedic Foot and Ankle Society Score for the English-Literate Singapore Population With Hallux Valgus.

Foot & ankle specialist Pub Date : 2024-08-01 Epub Date: 2022-02-21 DOI:10.1177/19386400221079490

Chin Chuen Tan, Andrew Arjun Sayampanathan, Yu Heng Kwan, William Yeo, Inderjeet Singh Rikhraj, Nicholas Eng Meng Yeo

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Abstract

Background: This study aimed to evaluate the reliability and validity of the American Orthopaedic Foot and Ankle Society Metatarsophalangeal-Interphalangeal (AOFAS MTP-IP) score in patients with hallux valgus in Singapore.

Method: A total of 121 English-literate patients with hallux valgus identified between October 2017 and May 2020 were analyzed. Reliability was assessed via Cronbach α. Construct validity was evaluated through 20 a priori hypotheses by correlating the AOFAS MTP-IP score for hallux and lesser toes with other patient-reported outcome measures (PROMs). Standardized response means (SRMs) were calculated to evaluate responsiveness at 6 months postoperative. Structural validity was evaluated via confirmatory factor analysis (CFA) whereby a good fit was indicated when comparative fit index (CFI) is >0.95, Tucker-Lewis index (TLI) is >0.95 and standardized root mean residual (SRMR) is <0.08.

Results: The AOFAS MTP-IP score demonstrated reliability with a Cronbach α of 0.837. Convergent construct validity was confirmed when all a priori hypotheses were fulfilled. Structural validity was established with our AOFAS MTP-IP score model that displayed good fit for a 1-factor structure (CFI = 0.988, TLI = 0.960, SRMR = 0.034). Responsiveness of the AOFAS MTP-IP score for hallux was demonstrated by an SRM score of 1.28.

Conclusion: The AOFAS MTP-IP score displayed adequate reliability and validity among English-literate patients in Singapore with an operatively managed hallux valgus.

Level of evidence: Level III: Retrospective cohort study.

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美国矫形外科足踝协会为患有拇指外翻的英语水平较低的新加坡人所做评分的有效性和可靠性。

背景：本研究旨在评估美国骨科足踝协会跖趾关节-头侧关节（AOFAS MTP-IP）评分在新加坡外翻患者中的可靠性和有效性：方法：对2017年10月至2020年5月期间发现的121名英语水平较高的外翻患者进行分析。信度通过 Cronbach α 进行评估。通过将AOFAS MTP-IP对外翻和小趾的评分与其他患者报告结果测量（PROMs）相关联，通过20个先验假设评估结构有效性。计算标准化反应平均值（SRM）以评估术后 6 个月的反应性。结构有效性通过确认性因子分析（CFA）进行评估，当比较拟合指数（CFI）大于 0.95、塔克-刘易斯指数（TLI）大于 0.95 且标准化均值残差（SRMR）为结果时，则表示拟合良好：AOFAS MTP-IP 评分的信度为 Cronbach α 0.837。在满足所有先验假设的情况下，收敛构造效度得到了证实。我们的 AOFAS MTP-IP 评分模型显示出良好的单因素结构拟合度（CFI = 0.988，TLI = 0.960，SRMR = 0.034），从而确立了结构效度。AOFAS MTP-IP 分值的 SRM 值为 1.28，证明了 AOFAS MTP-IP 分值对拇指外翻的响应性：AOFAS MTP-IP 评分在新加坡接受过手术治疗的、懂英语的患者中显示出足够的可靠性和有效性：证据等级：III级：回顾性队列研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Foot & ankle specialist

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