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Persian translation and validation of the Back Pain Functional Scale

机译：波斯翻译与验证背痛功能规模

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Background: Patient-reported questionnaires provide important tools that can be utilized for the assessment of treatment efficacy in clinic and research. This study aimed to translate, cross-culturally adapt, and validate the Back Pain Functional Scale into Persian (BPFSp). Methods: In this cross-sectional and prospective cohort of adult patients with low back pain (LBP), the translation and adaptation was performed according to standardized guidelines and pretested (n=30). Psychometric testing was conducted with 100 patients with LBP and 50 healthy subjects. Fifty patients with LBP recompleted the BPFSp at least 7days later for test-retest reliability. Results: The Persian adapted version of the BPFS was produced and validated. No floor and ceiling effects were revealed. The Cronbach' coefficient for internal consistency was 0.895. The test-retest reliability was excellent (ICCagreement=0.88, CI 95%: 0.80-0.93). The standard error of measurement and smallest detectable change were 9.9% and 27.5%, respectively. Construct convergent validity was demonstrated with the Persian Functional Rating Index (r=-0.77). Criterion validity was established with the Numerical Pain Rating Scale (r=-0.67). Total BPFSp scores discriminated between patients with LBP and healthy subjects. Factor structure showed two latent factors explaining a total variance of 60.1%. Conclusion: The BPFSp presented excellent reliability and validity for assessing the functional status in Persian speaking patients with LBP.
机译：背景：患者报告的问卷提供了重要的工具，可用于评估诊所和研究中的治疗效果。本研究旨在转化，交叉文化适应，并将背痛功能规模验证到波斯语（BPFSP）中。方法：在这种横断面和前瞻性伴有低疼痛（LBP）的成年患者（LBP），根据标准化指南进行翻译和适应，并预先测试（n = 30）。用100名LBP和50名健康受试者进行心理测量测试。 50例LBP患者至少重新完成7天的BPFSP，以进行测试 - 保持最可靠性。结果：生产和验证了BPFS的波斯调整版本。没有揭示任何地板和天花板效应。 Cronbach'内部一致性系数为0.895。测试 - 保持可靠性优异（iccagreement = 0.88，CI 95％：0.80-0.93）。测量标准误差和最小可检测变化分别为9.9％和27.5％。通过波斯功能评级指数（R = -0.77）对构建会聚有效性进行说明。标准有效性以数值疼痛评定量表（R = -0.67）建立。患有LBP和健康受试者的患者之间的总BPFSP分数。因子结构显示出两个潜在因子，解释总方差为60.1％。结论：BPFSP呈现出优异的可靠性和有效性，用于评估PESSIAN患者的LBP患者的功能状态。

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