Adaptación cultural y validación al español del cuestionario de síntomas de glaucoma (Glaucoma Symptom Scale, GSS)

Ruiz, Miguel Á.; Pardo, Antonio; Martinez-de-la-Casa, José M.; Polo, Vicente; Esquirol, Jordi; Soto, Javier

doi:10.1016/j.medcli.2008.06.005

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…Cronbach’s alpha coefficient for the total GSS in Serbian language was proper (>0.80) and thus, internal consistency of Serbian GSS can be labeled appropriate. The Cronbach’s alpha coefficient observed in our study was consistent with coefficients in the original scale [17], but also in other populations [18, 19]. When GSS domains were analyzed, Cronbach’s alpha coefficients for SYMP-6 subscale were also greater than 0.8, meaning that items in this domain comprise one meaningful and consistent construct related to non-visual symptoms.…”

Section: Discussionsupporting

confidence: 87%

“…The English version was developed using the CTT and, thus far, has been translated and validated in Italian and Spanish populations. These three versions of the GSS underwent an assessment of psychometric properties using the CTT and the results have showed adequate validity and reliability [11–19]. However, when Rasch analysis of the English version was performed in Australian [20] and Indian [21] glaucoma populations, poor psychometric properties were reported.…”

Section: Introductionmentioning

confidence: 99%

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Glaucoma Symptom Scale: Psychometric properties of the Serbian version

et al. 2019

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Purpose The study aim was to translate and validate the Glaucoma Symptom Scale (GSS) in Serbian language. Methods Clinical parameters and socio-demographic data were collected for each of the 177 enrolled glaucoma patients. Each eye was classified according to the Glaucoma staging system by Mills into 6 stages. Patients filled out the GSS and National Eye Institute Visual Function Questionnaire (NEI-VFQ 25). The GSS comprises 10 complaints common for glaucoma patients on a topical treatment, grouped into two subscales: SYMP-6 (non-visual) and FUNC-4 (visual problems). The GSS was translated following the customary methodology and its psychometric properties were assessed by using both Classical Test Theory (CTT) and Rasch analysis. Results The internal consistency of the Serbian GSS for the whole scale was very good (Cronbach’s alpha = 0.81). On factor analysis items were clustered into 2 factors (48.92% of variance) which corresponded to the original scale. The total and subscale GSS scores correlated significantly with measures of disease severity and also with total score and analogous NEI-VFQ 25 subscale scores. In Rasch analysis we obtained adequate item reliability index (0.90). Almost all items had infit and outfit mean squares in the accepted range. However, measurement precision was poor (low person separation reliability) and targeting revealed a ceiling effect. Conclusion When analyzed with CTT the Serbian version of the GSS seems to be a valid instrument, but Rasch analysis revealed some serious measurement flaws, therefore it should not be used in its current format. Further studies to modify and improve GSS are needed prior to its application for Serbian glaucoma patients.

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Glaucoma Symptom Scale: Psychometric properties of the Serbian version

et al. 2019

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Translation and validation of the contact lens dry eye questionnaire-8 (CLDEQ-8) to the Spanish language

Garza-León

Amparo

Ortíz

et al. 2019

Contact Lens and Anterior Eye

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Glaucoma Medication and Quality of Life after Phacoemulsification Combined with a Xen Gel Stent

Pahljina

Sarny

Hoeflechner

et al. 2022

JCM

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Glaucoma has a significant impact on quality of life. Here, we aimed to evaluate the influence of a reduction in glaucoma medications on quality of life and patient satisfaction after phacoemulsification combined with the Xen gel stent. We carried out a cross-sectional survey of patients who underwent phacoemulsification with the Xen gel stent at the Medical University of Graz, Austria. Quality of life was assessed using the German version of the Glaucoma Symptoms Scale (GSS)—questionnaire. Patients were also asked whether the operation reduced glaucoma medications and to indicate their overall satisfaction from 1 (totally discontented) up to 10 (totally contented). Questionnaires of 80 patients were evaluated. A total of 36 patients (45.0%) reported a reduction in glaucoma medications. Three items of the GSS were significantly better in patients who needed fewer glaucoma medications after the operation (“hard to see in daylight”, 75.0 ± 31.1 vs. 57.7 ± 39.1, p = 0.035; “hard to see in dark places”, 81.1 ± 28.7 vs. 54.9 ± 41.2, p = 0.002; and “halos around lights”, 88.3 ± 25.9 vs. 68.8 ± 38.6, p = 0.002). Patient satisfaction was significantly higher when the procedure led to a reduction in glaucoma medication (8.3 ± 2.0 vs. 6.8 ± 3.1; p = 0.034). The reported quality of life and patient satisfaction were significantly better when phacoemulsification with the Xen gel stent reduced the number of glaucoma medications needed.

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Adaptación cultural y validación al español del cuestionario de síntomas de glaucoma (Glaucoma Symptom Scale, GSS)

Cited by 5 publications

References 14 publications

Glaucoma Symptom Scale: Psychometric properties of the Serbian version

Glaucoma Symptom Scale: Psychometric properties of the Serbian version

Translation and validation of the contact lens dry eye questionnaire-8 (CLDEQ-8) to the Spanish language

Glaucoma Medication and Quality of Life after Phacoemulsification Combined with a Xen Gel Stent

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