Wu Jianli, Horgas Ann L, Booker Staja Q
J Gerontol Nurs. 2025 Feb;51(2):13-22. doi: 10.3928/00989134-20250102-01. Epub 2025 Jan 10.
To evaluate the factor structure of the Brief Pain Inventory-Short Form (BPI-SF) and measurement invariance across two age groups for African American (AA) older adults with osteoarthritis (OA).
Participants were AA older adults aged 50 to 94 years with self-reported OA and chronic pain ( = 110). Cross-sectional data from the BPI-SF were obtained from all participants, and confirmatory factor analysis (CFA) was used to evaluate the factor structure. Measurement invariance across young-old (aged 50 to 69 years) and old-old (aged 70 to 94 years) participants was examined at configural, full metric, and full scalar levels.
CFA revealed that a three-factor model (i.e., pain intensity, activity interference, and affective interference) demonstrated the best fit (χ/df = 1.595, comparative fit index [CFI] = 0.949, root-mean-square error of approximation = 0.074). The change of CFI between configural and metric invariance was below the cutoff point of 0.01, supporting full metric (i.e., factor loadings) invariance across the two age groups. However, full scalar (i.e., item intercepts) invariance was not demonstrated.
Results support a three-factor structure of the BPI-SF, which is consistent across two age groups for AA older adults with OA. This study provides evidence that the BPI-SF can reliably measure pain intensity and two distinct dimensions of pain interference in this population. [(2), 13-22.].
评估简明疼痛问卷简表（BPI-SF）的因子结构，以及在两个年龄组的非裔美国（AA）骨关节炎（OA）老年患者中的测量不变性。
参与者为年龄在50至94岁之间、自我报告患有OA和慢性疼痛的AA老年患者（n = 110）。从所有参与者处获取BPI-SF的横断面数据，并使用验证性因子分析（CFA）评估因子结构。在构型、完全度量和完全标量水平上检验年轻老年组（年龄50至69岁）和老年老年组（年龄70至94岁）参与者之间的测量不变性。
CFA显示，三因子模型（即疼痛强度、活动干扰和情感干扰）显示出最佳拟合度（χ²/df = 1.595，比较拟合指数[CFI] = 0.949，近似均方根误差 = 0.074）。构型不变性和度量不变性之间的CFI变化低于0.01的临界值，支持两个年龄组之间的完全度量（即因子载荷）不变性。然而，未证明完全标量（即项目截距）不变性。
结果支持BPI-SF的三因子结构，这在患有OA的AA老年患者的两个年龄组中是一致的。本研究提供了证据，表明BPI-SF可以可靠地测量该人群的疼痛强度和疼痛干扰的两个不同维度。[（2），13 - 22。]
