Validity and Reliability of the Glaucoma Knowledge Level Questionnaire
Journal Title: TÜRK OFTALMOLOJİ DERGİSİ - Year 2018, Vol 48, Issue 3
Abstract
Objectives: The present study was conducted to develop an instrument for measuring adults’ glaucoma knowledge levels and to establish the instrument’s validity and reliability. Materials and Methods: The study group consisted of 811 persons aged 40-80 years who presented to primary health care institutions and did not have a glaucoma diagnosis. A 27-item questionnaire measuring level of glaucoma knowledge was created by the study team. Following expert consultation, it was structurally evaluated. The difficulty index and discrimination index were calculated for each item. Factor analysis was used to determine construct validity, Cronbach’s alpha internal consistency coefficient and item-total correlations were calculated to determine reliability. Confirmatory factor analysis was used to assess the extent to which the factor structure of the scale fit. We analysed correlation with the National Eye Health Education Program (NEHEP) Eye-Q scale in order to evaluate the validity of the scale. Results: The final glaucoma knowledge level questionnaire comprised 10 items in one dimension. The discrimination index and difficulty index ranged between 0.28 to 0.65 and 33 to 61%, respectively. According to factor analysis, the Kaiser-Meyer-Olkin score was 0.760 and Bartlett’s test indicated p<0.001. Confirmatory factor analysis showed acceptable scale fit and fit indices. Validity assessment revealed a positive correlation between the total score of the items of the NEHEP scale and glaucoma knowledge level questionnaire score (r=0.522; p<0.001). Scores were higher in participants who were aged 40-64, living in the city, had education level of high school or above and had previous eye examination or intraocular pressure measurement. Conclusion: The glaucoma knowledge level questionnaire has the distinction of being the first valid and reliable scale for assessing level of glaucoma knowledge in Turkey.
Authors and Affiliations
Zeynep Demirtaş, Gökçe Dağtekin, Muhammed Fatih Önsüz, Aziz Soysal, Nilgün Yıldırım, Selma Metintaş
Keywords
Related Articles
- EP ID EP382147
- DOI 10.4274/tjo.26576
- Views 130
- Downloads 0
Tek Taraflı Kronik Konjonktivitli İki Olguda Göz Kapağında Molluskum Kontagiozum Lezyonları
Molluskum kontagiozum (MK), deri ve mukozada yerleşen, tipik olarak ortası çökük, deri renginde veya saydam yuvarlak nodüller ile karakterize viral bir enfeksiyondur. Etkeni poxvirüs grubundan bir DNA virüsü olan MK virü...
Impact of Cataract Surgery on Functional Balance Skills of Adults
Objectives: To investigate the impact of phacoemulsification surgery and intraocular lens implantation on the functional balance skills of adults. Materials and Methods: This prospective study included patients with cata...
Koroidal Osteom ve Ranibizumab ile Tedavi Edilen Sekonder Koroid Neovaskülarizyonu
Kırk yedi yaşında kadın hasta sağ gözde görmede azalma şikayeti ile başvurdu. Hastanın yapılan muayenesinde görme keskinliği sağda 0,16, solda tam idi. Fundus muayenesinde ise sağda makülada yerleşim gösteren sarı-beyaz...
Role of Oxidative Stress in Pseudoexfoliation Syndrome and Pseudoexfoliation Glaucoma
Objectives: To investigate the role of oxidative stress on pseudoexfoliation formation and progression from pseudoexfoliation syndrome (XFS) to pseudoexfoliation glaucoma (XFG). Materials and Methods: This study investig...
Göz İçi Lenslerde Biyouyumluluk
Göz içi lensinin performansı cerrahi teknik, cerrahi komplikasyonlar, göz içi lensinin biyomateryal ve tasarımı ve kişinin lense verdiği yanıt gibi faktörlerce belirlenmektedir. Göz içi lenslerin biyouyumluğunda belirley...