Allergan Inc., 2525 Dupont Drive, Irvine, CA 92623, USA.
J Glaucoma. 2011 Mar;20(3):148-59. doi: 10.1097/IJG.0b013e3181e07970.
To evaluate the psychometric properties of the Glaucoma Symptom Identifier (GSI), a tool designed to assess multiple possible glaucoma symptoms and their impact on quality of life in clinical practice. We sought to address the need for better methods to assess visual function related to quality of life of glaucoma patients with a tool to show to both physicians and their patients that glaucoma is not an asymptomatic disease. The development process was to provide comprehensive assessment in 1 page of the impact of glaucoma on patients' quality of life by including an exhaustive list of unique and nonredundant items.
Cross-sectional online survey.
Seven hundred and eighteen individuals with a self-reported diagnosis of glaucoma, who were at least 40 years of age.
The impact of glaucoma was assessed by asking study participants the degree of difficulty they experience on a number of tasks. Item response theory was used to psychometrically evaluate the GSI. Scores on the GSI and the SF-12, a generic quality-of-life instrument, were compared.
Items in the GSI were categorized in terms of their ability to capture glaucoma impact on quality of life across the population range of subjects from mild-to-severe glaucoma severity.
The GSI showed good reliability, and convergent and discriminant validity. Items in the GSI captured glaucoma impact on quality of life over an adequate range of disease severity. Potential improvements to the existing questionnaire were identified using item response theory modeling results and respondents' feedback on the survey.
Our findings suggest that the GSI is a psychometrically valid tool, adequate for glaucoma patients' self-administration within a clinician's routine practice to help both the patient and physician assess the patient's current and potential future symptoms of glaucoma.
评估青光眼症状识别器（GSI）的心理测量特性，这是一种旨在评估多种可能的青光眼症状及其对临床实践中生活质量影响的工具。我们旨在通过提供一种工具来解决评估与青光眼患者生活质量相关的视觉功能的更好方法的需求，该工具向医生及其患者表明青光眼并非无症状疾病。该工具的开发过程旨在通过包含详尽的独特且非冗余项目列表，在 1 页内全面评估青光眼对患者生活质量的影响。
横断面在线调查。
718 名自我报告患有青光眼的个体，年龄至少为 40 岁。
通过询问研究参与者在多项任务中遇到的困难程度来评估青光眼的影响。使用项目反应理论对 GSI 进行心理测量评估。将 GSI 得分与 SF-12（一种通用生活质量工具）进行比较。
GSI 中的项目根据其在从轻度到重度青光眼严重程度的受试者人群范围内捕获青光眼对生活质量影响的能力进行分类。
GSI 显示出良好的可靠性，以及收敛和判别有效性。GSI 中的项目在足够的疾病严重程度范围内捕获了青光眼对生活质量的影响。使用项目反应理论建模结果和受访者对调查的反馈，确定了对现有问卷的潜在改进。
我们的研究结果表明，GSI 是一种心理测量有效的工具，适合青光眼患者在医生常规实践中进行自我管理，以帮助患者和医生评估患者当前和潜在未来的青光眼症状。
