Psychometric Properties of the Glaucoma Treatment Compliance Assessment Tool (GTCAT) in a Brazilian Population
| Autor: | Ricardo Y. Abe, Steven L. Mansberger, Gordon T. Barker, Lorena de Campos Wen |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Psychometrics Glaucoma Administration Ophthalmic 03 medical and health sciences 0302 clinical medicine Cronbach's alpha Brazilian Portuguese Surveys and Questionnaires Humans Medicine Health belief model 030212 general & internal medicine Antihypertensive Agents Intraocular Pressure Reliability (statistics) Aged Language Principal Component Analysis Rasch model business.industry Reproducibility of Results Construct validity Middle Aged medicine.disease language.human_language Ophthalmology 030221 ophthalmology & optometry language Patient Compliance Female Ophthalmic Solutions business Brazil Clinical psychology |
| Zdroj: | Journal of Glaucoma. 27:257-265 |
| ISSN: | 1057-0829 |
| Popis: | Purpose To determine the psychometric properties of a reduced version of the Glaucoma Treatment Compliance Assessment Tool (GTCAT), which was translated to Brazilian Portuguese. Patients and methods We translated into Portuguese the GTCAT using validated techniques and administered it to a group of glaucoma patients using at least 1 ocular hypotensive eye drop medication. We used principal components analysis to determine construct validity, Rasch analysis, and Cronbach α for internal consistency reliability, frequency analysis for floor and ceiling effects, and Spearman ρ for test-retest reliability. Results We included 76 glaucoma patients. Principal component analysis loaded 14 questions into 7 components that were consistent with the Health Belief Model. The components were related to "barriers due to lack of drops," "self-efficacy," "experience of negative effects of the disease," "well-being," "general glaucoma knowledge," "glaucoma symptoms," and "cues-to-action." No statements had floor or ceiling effects, and all statements had acceptable test-retest reliability. Components had internal consistency Cronbach α reliability between 0.125 and 0.794. and average Spearman ρ reliability was 0.73, ranging from 0.44 to 1.00. According to Rasch analysis, the mean (±SD) of the person measures was 0.24±0.15 logits, person separation index was 0.58, and person reliability 0.25. Conclusions The Portuguese-translated version of the GTCAT showed acceptable psychometric properties. With further refinement, clinicians and researchers could use it to better investigate glaucoma adherence issues in the Brazilian population. |
| Databáze: | OpenAIRE |
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