Translating measurement into practice with PHQ-9 calculator: an open tool to assess depression levels in the Brazilian population.

IF 2.1 Q3 PSYCHIATRY

Trends in Psychiatry and Psychotherapy Pub Date : 2025-02-02 DOI:10.47626/2237-6089-2024-0978

João Villanova do Amaral, Igor Duarte, André Rafael Simioni, Gabriele Dos Santos Jobim, Ighor Miron Porto, João Pedro Gonçalves Pacheco, Rodolfo Furlan Damiano, Maurício Scopel Hoffmann

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引用次数: 0

Abstract

Objective: We aim to create a web-based calculator for assessing depressive symptoms with the Patient Health Questionnaire 9 (PHQ-9), utilizing IRT-based standardized scores, to improve measurement precision, standardization, and practical application in clinical practice.

Methods: This study developed a web-based calculator using a graded response IRT model for assessing depressive symptoms with the PHQ-9, using data from the Brazilian National Health Survey 2019 (n = 90,846, aged 15 to 107 years old, 52.8% female). The tool calculates latent depressive symptoms and converts them into T-scores, with stratification by sex and age groups. The application respects patient confidentiality by deleting sensitive information postcalculation.

Results: Estimated models resulted in a mean sample size of 3244.5 participants in each group (SD: 1066). The calculator can be accessed at https://mheg.shinyapps.io/phq9-score.

Discussion: The development of an IRT-based web calculator for the PHQ-9 represents an advancement in depressive symptoms' assessment, offering precision and potential clinical utility. By standardizing scores into a common metric, this tool facilitates the interpretation of depressive symptoms and comparison across different instruments. The study's scope is limited to the Brazilian population and external validity for other contexts is warranted. Future studies should evaluate the clinical validity and the threshold of the tool for predicting real life problems.

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目的：利用基于红外光谱的标准化评分，利用患者健康问卷9 （PHQ-9）创建一个基于网络的抑郁症状评估计算器，以提高测量精度、标准化和在临床实践中的实际应用。方法：本研究开发了一个基于网络的计算器，使用分级反应IRT模型来评估PHQ-9的抑郁症状，使用的数据来自2019年巴西国家健康调查（n = 90,846，年龄在15至107岁之间，52.8%为女性）。该工具计算潜在的抑郁症状，并将其转换成t分数，并按性别和年龄组分层。应用程序通过在计算后删除敏感信息来尊重患者的机密性。结果：估计模型导致每组平均样本量为3244.5名参与者（SD: 1066）。该计算器可访问https://mheg.shinyapps.io/phq9-score.Discussion：基于irt的PHQ-9网络计算器的开发代表了抑郁症状评估的进步，提供了准确性和潜在的临床应用。通过将分数标准化为一个共同的度量标准，该工具有助于解释抑郁症状和跨不同工具的比较。该研究的范围仅限于巴西人口，并保证在其他情况下具有外部有效性。未来的研究应该评估临床有效性和预测现实生活问题的工具的阈值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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