Introduction. The Geriatric Depression Scale (GDS) is commonly used to assess depressive symptoms, but its psychometric properties have never been examined in Italian people with Parkinson's disease (PD). The aim of this study was to study the reliability and validity of the Italian version of the GDS in a sample of PD patients. Methods. The GDS was administered to 74 patients with PD in order to study its internal consistency, test-retest reliability, construct, and discriminant validity. Results. The internal consistency of GDS was excellent (α = 0.903), as well as the test-retest reliability (ICC = 0.941 [95% CI: 0.886-0.970]). GDS showed a strong correlation with instruments related to the depression (ρ = 0.880) in PD (ρ = 0.712) and a weak correlation with generic measurement instruments (-0.320 < ρ <-0.217). An area under the curve of 0.892 (95% CI 0.809-0.975) indicated a moderate capability to discriminate depressed patients to nondepressed patient, with a cutoff value between 15 and 16 points that predicts depression (sensitivity = 87%; specificity = 82%). Conclusion. The GDS is a reliable and valid tool in a sample of Italian PD subjects; this scale can be used in clinical and research contexts.

Reliability and validity of the geriatric depression scale in Italian subjects with Parkinson's disease / Massai, Perla; Colalelli, Francesca; Sansoni, Julita; Valente, Donatella; Tofani, Marco; Fabbrini, Giovanni; Fabbrini, Andrea; Scuccimarri, Michela; Galeoto, Giovanni. - In: PARKINSON'S DISEASE. - ISSN 2042-0080. - 2018:(2018), pp. 1-6. [10.1155/2018/7347859]

Reliability and validity of the geriatric depression scale in Italian subjects with Parkinson's disease

Julita Sansoni;Donatella Valente;Marco Tofani;Giovanni Fabbrini;Andrea Fabbrini;Giovanni Galeoto
Conceptualization
2018

Abstract

Introduction. The Geriatric Depression Scale (GDS) is commonly used to assess depressive symptoms, but its psychometric properties have never been examined in Italian people with Parkinson's disease (PD). The aim of this study was to study the reliability and validity of the Italian version of the GDS in a sample of PD patients. Methods. The GDS was administered to 74 patients with PD in order to study its internal consistency, test-retest reliability, construct, and discriminant validity. Results. The internal consistency of GDS was excellent (α = 0.903), as well as the test-retest reliability (ICC = 0.941 [95% CI: 0.886-0.970]). GDS showed a strong correlation with instruments related to the depression (ρ = 0.880) in PD (ρ = 0.712) and a weak correlation with generic measurement instruments (-0.320 < ρ <-0.217). An area under the curve of 0.892 (95% CI 0.809-0.975) indicated a moderate capability to discriminate depressed patients to nondepressed patient, with a cutoff value between 15 and 16 points that predicts depression (sensitivity = 87%; specificity = 82%). Conclusion. The GDS is a reliable and valid tool in a sample of Italian PD subjects; this scale can be used in clinical and research contexts.
2018
neuroscience (miscellaneous); neurology (clinical); psychiatry and mental health
01 Pubblicazione su rivista::01a Articolo in rivista
Reliability and validity of the geriatric depression scale in Italian subjects with Parkinson's disease / Massai, Perla; Colalelli, Francesca; Sansoni, Julita; Valente, Donatella; Tofani, Marco; Fabbrini, Giovanni; Fabbrini, Andrea; Scuccimarri, Michela; Galeoto, Giovanni. - In: PARKINSON'S DISEASE. - ISSN 2042-0080. - 2018:(2018), pp. 1-6. [10.1155/2018/7347859]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1166961
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