Validation of the Spanish version of the Oxford Cognitive Screen (S-OCS): psychometric properties of a short cognitive stroke-specific screening tool

Desirée Valera-Gran; Sofía López-Roig; Miriam Hurtado-Pomares; Paula Peral-Gómez; María García-Manzanares; Marta Sunyer Catlla; Gemma Más Sesé; Eva María Navarrete-Muñoz; Alicia Sánchez-Pérez

doi:10.1177/0269215518819046

Validation of the Spanish version of the Oxford Cognitive Screen (S-OCS): psychometric properties of a short cognitive stroke-specific screening tool

Clin Rehabil. 2019 Apr;33(4):724-736. doi: 10.1177/0269215518819046. Epub 2018 Dec 19.

Authors

Affiliations

¹ 1 Department of Pathology and Surgery, Miguel Hernández University, Alicante, Spain.
² 2 Institute for Health and Biomedical Research (ISABIAL-FISABIO Foundation), Alicante, Spain.
³ 3 Department of Health Psychology, Miguel Hernández University, Alicante, Spain.
⁴ 4 Rehabilitation Unit, University San Juan Hospital, Alicante, Spain.
⁵ 5 Rehabilitation Unit, Hospital La Pedrera, Alicante, Spain.
⁶ 6 CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.
⁷ 7 Department of Public Health, History of Medicine and Gynecology, Miguel Hernández University, Alicante, Spain.

PMID: 30563369
DOI: 10.1177/0269215518819046

Abstract

Objective:: The aim of this study is to examine the psychometric properties of the Spanish version of the Oxford Cognitive Screen in a subacute stroke population.

Participants and setting:: Fifty-seven subacute stroke outpatients and 54 healthy individuals were recruited in Alicante province, Spain.

Main measure:: The Oxford Cognitive Screen.

Other measures:: The Montreal Cognitive Assessment, the Barcelona test, and the Barthel Index.

Design:: A validation study was conducted to analyze the inter-rater, intra-rater, test-retest, and internal consistency of the Spanish version of the Oxford Cognitive Screen. Concurrent validity was assessed using the Montreal Cognitive Assessment and the Barcelona test, and divergent validity using the Barthel index. Discriminant indices such as the sensitivity, specificity, predictive values, and optimal cut-offs were also estimated.

Results:: The subtests of the Spanish version of the Oxford Cognitive Screen showed excellent estimates for the inter-reliability (intraclass correlation coefficient (ICC) = 0.790 to 1.000; r_s = 0.693 to 1.000), and acceptable-good for intra-reliability (ICC = 0.181 to 0.990) and test-retest reliability ( r_s = 0.173 to 0.971). Internal consistency was also excellent (standardized Cronbach's α = 0.907). Spearman correlations for the concurrent validity were low-strong ( r_s = -0.193 to 0.95) and low-moderate ( r_s = -0.091 to 0.443) for divergent validity. The optimal cut-offs estimated for the subtests of the Spanish version of the Oxford Cognitive Screen showed good-high specificity (66.7%-100%) and positive predictive value (67.9%-100%), and low-good sensitivity (14.8%-83.3%) and moderate-good negative predictive value (53.5%-76.6%). Discriminant power as measured by the area under the curve indicated acceptable-good values (0.397 to 0.894).

Conclusion:: Our findings support that the Spanish version of the Oxford Cognitive Screen is a reliable and valid tool for screening cognitive impairments in subacute stroke patients.

Keywords: Oxford Cognitive Screen; Stroke; assessment; psychometric properties; validation.

Publication types

Validation Study

MeSH terms

Aged
Case-Control Studies
Cognitive Dysfunction / diagnosis*
Cognitive Dysfunction / etiology
Female
Humans
Male
Neuropsychological Tests*
Psychometrics
Reproducibility of Results
Spain
Stroke / complications*
Translations