Arruda Guilherme T, da Silva Maria Eduarda C B, da Silva Barbara I, Driusso Patricia, Avila Mariana A
Study Group on Chronic Pain (NEDoC), Laboratory of Research on Electrophysical Agents (LAREF), Physical Therapy Department, Universidade Federal de São Carlos - UFSCar, São Paulo, São Carlos, Brazil.
Study Group on Chronic Pain (NEDoC), Laboratory of Research on Electrophysical Agents (LAREF), Physical Therapy Department, Universidade Federal de São Carlos - UFSCar, São Paulo, São Carlos, Brazil.
Value Health. 2025 Jan;28(1):99-107. doi: 10.1016/j.jval.2024.08.007. Epub 2024 Sep 28.
To develop the Dysmenorrhea-related Impact on Functioning Scale (DIFS) to assess the impact of dysmenorrhea on functioning in cisgender women and transgender men and to evaluate its measurement properties.
Mixed and online design study conducted with adolescents and adult cisgender women and transgender men with dysmenorrhea. We developed the DIFS based on the International Classification of Functioning, Disability, and Health. Content validity was assessed with experts and people with dysmenorrhea. Item Response Theory developed the DIFS total score. Structural validity was assessed by exploratory and confirmatory factor analysis and internal consistency by Cronbach's α and McDonald's Ω. Construct validity and test-retest reliability were assessed by correlation between DIFS and World Health Organization Disability Assessment Schedule and intraclass correlation coefficient, respectively. Measurement error was also assessed.
A total of 3335 people participated in the study. The DIFS is a 15-item instrument divided into "Bodily Functions" and "Daily Activities and Social Participation" sections and "Functioning" as a general factor. Internal consistency (α and Ω > 0.7) and test-retest reliability (intraclass correlation coefficient > 0.9) were adequate. No systematic error was found. Correlation was positive and strong between World Health Organization Disability Assessment Schedule and "Functioning" (r = 0.62, P ≤ .05). For the DIFS total score, higher scores indicate a greater impact of dysmenorrhea on functioning, and 44 points is the cutoff point for classifying the person with a significant impact of dysmenorrhea on functioning.
DIFS showed excellent measurement properties for assessing the impact of dysmenorrhea on functioning for cisgender women and transgender men.
开发痛经相关功能影响量表（DIFS），以评估痛经对顺性别女性和跨性别男性功能的影响，并评估其测量属性。
对患有痛经的青少年及成年顺性别女性和跨性别男性进行混合式和在线设计研究。我们基于《国际功能、残疾和健康分类》开发了DIFS。通过专家和痛经患者评估内容效度。项目反应理论得出DIFS总分。通过探索性和验证性因素分析评估结构效度，通过Cronbach's α和McDonald's Ω评估内部一致性。分别通过DIFS与世界卫生组织残疾评定量表之间的相关性以及组内相关系数评估构想效度和重测信度。还评估了测量误差。
共有3335人参与研究。DIFS是一个包含15个条目的工具，分为“身体功能”和“日常活动与社会参与”部分，以及作为一般因素的“功能”。内部一致性（α和Ω>0.7）和重测信度（组内相关系数>0.9）良好。未发现系统误差。世界卫生组织残疾评定量表与“功能”之间的相关性为正且较强（r = 0.62，P≤.05）。对于DIFS总分，分数越高表明痛经对功能的影响越大，44分是将痛经对功能有显著影响的人分类的临界点。
DIFS在评估痛经对顺性别女性和跨性别男性功能的影响方面显示出优异的测量属性。
