Development and validation of a patient-reported gout attack intensity score for use in gout clinical studies.
Rheumatology (Oxford)
; 58(11): 1928-1934, 2019 11 01.
Article
em En
| MEDLINE
| ID: mdl-30859221
ABSTRACT
OBJECTIVE:
Inflammation-related symptoms such as pain, swelling and tenderness of the affected joint are frequently assessed using 5-point diary rating scales in gout clinical trials. Combining these into a single gout attack symptom intensity score may be a useful summary measure for these data, which is potentially more responsive to change compared with the individual components. The objective of this study was to develop a patient-reported gout flare intensity score, the Gout Attack Intensity Score (GAIS), for use in clinical studies, that includes components for gout-related pain, swelling and tenderness.METHODS:
Data from a randomized controlled trial comparing anakinra to standard of care for the treatment of acute gout attacks were used for this study. A 7-day flare diary was completed by patients, including questions relating to intensity of pain, swelling and tenderness (5-point rating scales). Scalability of these items was assessed using Mokken Scale Analysis, and reliability using greatest lower bound reliability coefficients. Known-groups validity was evaluated, as well as the responsiveness to change and the presence of floor and ceiling effects.RESULTS:
Scalability of the single items was supported, and GAIS scores were reliable (greatest lower bound >0.80). GAIS scores demonstrated responsiveness to change with high effect sizes (>0.8), and discriminated better between responders and non-responders compared with its single-item components. No floor and ceiling effects were found.CONCLUSION:
The GAIS seems to be a reliable and responsive instrument for assessing patient-reported gout attack intensity that may be used in gout clinical studies.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Índice de Gravidade de Doença
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Avaliação de Sintomas
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Exacerbação dos Sintomas
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Medidas de Resultados Relatados pelo Paciente
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Gota
Tipo de estudo:
Clinical_trials
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Diagnostic_studies
Limite:
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article