Department of Psychology, Health & Technology, Arthritis Center Twente, University of Twente, Enschede, The Netherlands.
BMC Musculoskelet Disord. 2013 Aug 9;14:234. doi: 10.1186/1471-2474-14-234.
Previous studies in patients with hip and knee osteoarthritis (OA) have advocated the relevance of assessing the number of painful joint sites, other than the primary affected joint, in both research and clinical practice. However, it is unclear whether joint-pain comorbidities can simply be summed up.
A total of 401 patients with hip or knee OA completed questionnaires on demographic variables and joint-pain comorbidities. Rasch analysis was performed to evaluate whether a sum score of joint-pain comorbidities can be calculated.
Self-reported joint-pain comorbidities showed a good fit to the Rasch model and were not biased by gender, age, disease duration, BMI, or patient group. As a group, joint-pain comorbidities covered a reasonable range of severity levels, although the sum score had rather low reliability levels suggesting it cannot discriminate well among patients.
Joint-pain comorbidities, in other than the primary affected joints, can be summed into a joint pain comorbidity score. Nevertheless, its use is discouraged for individual decision making purposes since its lacks discriminative power in patients with minimal or extreme joint pain.
先前针对髋和膝关节骨关节炎（OA）患者的研究表明，在研究和临床实践中，评估主要受累关节以外的疼痛关节数量具有相关性。然而，目前尚不清楚是否可以简单地对关节疼痛合并症进行汇总。
共 401 例髋或膝关节 OA 患者完成了关于人口统计学变量和关节疼痛合并症的问卷调查。采用 Rasch 分析评估是否可以计算关节疼痛合并症的总和得分。
自我报告的关节疼痛合并症与 Rasch 模型拟合良好，不受性别、年龄、疾病持续时间、BMI 或患者群体的影响。作为一个整体，关节疼痛合并症涵盖了合理的严重程度范围，尽管总分的可靠性水平较低，表明其在患者之间的区分能力较差。
除主要受累关节外的关节疼痛合并症可以汇总为关节疼痛合并症评分。然而，由于其在关节疼痛程度最小或最大的患者中缺乏区分能力，不建议用于个体决策目的。
