Duruöz Mehmet Tuncay, Acer Kasman Sevtap, Şahin Nilay, Sezer İlhan, Bodur Hatice, Ketenci Ayşegül, Hizmetli Sami, Erdem Gürsoy Didem, Demir Ali Nail, Menekşeoğlu Ahmet Kıvanç, Karadağ Ahmet, Baklacıoğlu Hatice Şule
Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Marmara University School of Medicine, İstanbul, Turkey.
Department of Physical Medicine and Rehabilitation, Balıkesir University School of Medicine, Balıkesir, Turkey.
Mod Rheumatol. 2021 Mar;31(2):451-457. doi: 10.1080/14397595.2020.1733172. Epub 2020 Mar 3.
To investigate the validation and reliability of Istanbul Low Back Pain Disability Index (ILBPDI) in axial spondyloarthritis (Ax-SpA).
Patients with Ax-SpA according to The Assessment of SpondyloArthritis International Society criteria were recruited. The validation was assessed by face, content, and construct (convergent and divergent) validities, whereas the reliability was assessed by internal consistency and test-retest reliability. Factor analysis was performed. Convergent validity was assessed by correlations of ILBPDI with functional parameters (The Bath Ankylosing Spondylitis Functional Index, The Dougados Functional Index, and The Health Assessment Questionnaire). Divergent validity was assessed by correlations of ILBPDI with non-functional parameters.
Two hundred forty patients were recruited. Cognitive debriefing showed ILBPDI to be clear, relevant, and comprehensive. Cronbach's alpha coefficient was 0.953. The test-retest reliability was good with the intraclass correlation coefficient of 0.870. ILBPDI was represented by three-factor groups of activity: axial bending, sitting/rest, and standing activities. ILBPDI had good correlations with the functional parameters (rho changes between 0.809 and 0.580), and it had poor or non-significant correlations with the non-functional parameters (absolute rho changes between 0.669 and 0.001).
ILBPDI is a practical, accurate, and non-time-consuming scale which is valid and reliable to evaluate the functional disability in patients with Ax-SpA.
探讨伊斯坦布尔下腰痛残疾指数（ILBPDI）在中轴型脊柱关节炎（Ax-SpA）中的有效性和可靠性。
招募符合国际脊柱关节炎评估协会标准的Ax-SpA患者。通过表面效度、内容效度和结构效度（收敛效度和区分效度）评估有效性，通过内部一致性和重测信度评估可靠性。进行因子分析。通过ILBPDI与功能参数（巴斯强直性脊柱炎功能指数、杜加多斯功能指数和健康评估问卷）的相关性评估收敛效度。通过ILBPDI与非功能参数的相关性评估区分效度。
招募了240名患者。认知反馈显示ILBPDI清晰、相关且全面。克朗巴赫α系数为0.953。重测信度良好，组内相关系数为0.870。ILBPDI由活动的三个因子组表示：轴向弯曲、坐/休息和站立活动。ILBPDI与功能参数具有良好的相关性（rho值在0.809至0.580之间变化），与非功能参数的相关性较差或无显著相关性（绝对rho值在0.669至0.001之间变化）。
ILBPDI是一种实用、准确且耗时少的量表，在评估Ax-SpA患者的功能残疾方面有效且可靠。
