The Korean Version of the Oxford Cognitive Screen (K-OCS) Normative Study.

OBJECTIVE: To generate a Korean version of the Oxford Cognitive Screen (K-OCS) and obtain cutoff scores that determine the impairment of each subdomain. Post-stroke cognitive impairment (PSCI) negatively impacts the rehabilitation process and independence in daily life. Its obscure manifestations require effective screening for appropriate rehabilitation. However, in most rehabilitation clinics, psychological evaluation tools for Alzheimer's dementia have been used without such considerations. The OCS is a screening assessment tool for PSCI and vascular dementia that can evaluate the cognitive domains most often affected by stroke, including language, attention, memory, praxis, and numerical cognition. It comprises 10 subtasks and enables quick and effective cognitive evaluation. METHODS: The K-OCS, which considers Korea's unique cultural and linguistic characteristics, was developed with the approval and cooperation of the original author. Enrollment of participants without disabilities was announced at Duksung Women's University, Yongin Sevrance Hospital, CHA Bundang Medical Center. The study was conducted between September 2020 and March 2022 on 97 male and female participants aged ≥30 years. RESULTS: All the 97 participants completed the task. In this study, the 5th percentile score was presumed to be the cutoff value for each score, and the values are provided here. The cutoff score for each OCS subtask was similar to that of the original British version. CONCLUSION: We suggest the usability of the K-OCS as a screening tool for PSCI by providing the cutoff value of each subtask.

The German version of the Oxford Cognitive Screen (D-OCS): Normative data and validation in acute stroke and a mixed neurological sample.

Given the frequency of stroke worldwide, tools for neuropsychological assessment of patients with acute stroke are needed to identify cognitive impairments, guide rehabilitation efforts and allow for a prognosis of outcome. However, requirements for assessment tools for acute cognitive deficits differ substantially from tests for chronic neuropsychological impairments and screening tools for suspected dementia. The Oxford Cognitive Screen (OCS) has been developed as a quick to administer neurocognitive screening for acute neurological patients providing information on various cognitive domains. It is available in different languages. The present study reports cut-off scores, parallel-test reliability and concurrent validity of the German version (D-OCS). Following standardized language adaptation and translation, the D-OCS was administered to 100 healthy individuals to generate cut-off scores (5th percentile). Subsequently, 88 neurological patients were assessed with both versions of the D-OCS as well as other tests to evaluate reliability and validity of the D-OCS subscales. In a further study, the D-OCS was compared to the MoCA test in 65 acute stroke patients revealing comparable sensitivity but also differences between both tools. The cut-off scores were comparable to other international versions of the OCS. Intraclass correlations were highly significant and document reliability of the D-OCS subtests. Scores on subtests correlated significantly with independent tests securing validity. Comparison with the MoCA revealed comparable sensitivity and specificity. The D-OCS is a reliable and valid assessment tool well suited for patients with acute stroke. Differences to the MoCA test are discussed.

The cultural and linguistic adaptation of the Oxford Cognitive Screen to Tamil.

OBJECTIVE: The Oxford Cognitive Screen (OCS) is a screening tool to assess stroke patients for deficits in attention, executive functions, language, praxis, numeric cognition, and memory. In this study, the OCS was culturally and linguistically adapted to Tamil, for use in India (OCS TA), considering the differences between formal and spoken versions of Tamil and consideration of its phonetic complexity. METHOD: We adopted two-parallel form versions of the OCS and generated normative data for them. We recruited 181 healthy controls (Mean = 39.27 years, SD 16.52) (141 completed version A, 40 completed version B, 33 completed version A and B) and compared the data with the original UK normative sample. In addition, 28 native Tamil-speaking patients who had a stroke in the past three years (Mean = 62.76 years, SD 9.14) were assessed. Convergent validity was assessed with subtasks from Addenbrooke's Cognitive Examination III (ACE-III). RESULTS: We found significant differences between the UK normative group and the OCS TA normative group in age and education. Tamil-specific norms were used to adapt the cutoffs for the memory, gesture imitation, and executive function tasks. When domain-specific scores on the ACE-III were compared, OCS TA exhibited strong convergent validity. CONCLUSIONS: The OCS TA has shown the potential to be a useful screening tool for stroke survivors among Tamil speakers with the two-parallel forms demonstrating good equivalence. Further empirical evidence from larger studies is required to establish their psychometric performance and clinical validity.

Oxford cognitive screen: A critical review and independent psychometric evaluation.

The Oxford cognitive screen (OCS) is a stroke-specific cognitive screening assessment. Although the test developers have provided psychometric information for the assessment, the OCS has received minimal external scrutiny, with which to triangulate the underpinning psychometrics. The purpose of this study is to provide a critical review and independent validation of the OCS. This study analysed data from an anonymised clinical database, which consisted of 316 patients who were assessed using the OCS on an Acute Stroke Unit. The rates of impairment on tests of memory and receptive communication were lower than expectation, suggesting that these subtests may be relatively insensitive. Patients with aphasia were more likely to be unable to categorised as impaired on non-language tests, suggesting that they remain sensitive to language processing or non-dominant hand usage. Some of the subtests of the OCS achieve high retest reliability, which makes them good candidates for measuring cognitive change over time. Although the OCS has many advantages, it is also important to adequately consider its limitations, that is insensitivity to memory problems, the potential confounding impact of non-dominant hand usage, and the potential that some tests may sample overall cognitive ability instead of domain-specific functioning.

Adaptación lingüística y cultural del Oxford Cognitive Screen (OCS) en población española / Cultural and linguistic adaptation of the Oxford Cognitive Screen to the Spanish population

Introducción: En España el ictus es la sexta causa de discapacidad. Sus secuelas producen alteraciones motoras, sensoriales y cognitivas, que pueden minimizarse con una actuación terapéutica temprana. Por ello se necesitan instrumentos de evaluación rápida que detecten déficits en estas áreas. El Oxford Cognitive Screen Test (OCS) es un test breve diseñado para la valoración de funciones cognitivas en pacientes con ictus. Nuestro objetivo fue generar una versión española (OCS-E) realizando una adaptación lingüística y cultural.Material y métodosDiseño de validación lingüística con doble traducción y 10 reuniones de consenso del equipo investigador multidisciplinar. Tres estudios piloto administrando el test respectivamente a 5 usuarios potenciales, 23 personas sanas y 23 diagnosticadas de ictus isquémico (61%) o hemorrágico, con edades entre 31-88 años.ResultadosEl OCS-E mantiene las 10 tareas originales, la codificación de respuestas y el sistema de puntuación. Se modificaron y ampliaron las instrucciones de administración, lo que asegura la fiabilidad del contenido y de su aplicación. En 5 tareas se han modificado imágenes, números y frases. La tarea praxia se amplió para evaluar ambos miembros superiores. Los estudios piloto confirmaron que las personas de la población diana comprendían de forma adecuada las tareas, con independencia de la existencia de problemas cognitivos.ConclusionesLa adaptación cultural ha generado una versión lingüística y conceptualmente equivalente, permitiendo su estudio psicométrico y posterior aplicación en población española. El OCS-E puede ser un instrumento de cribado útil para evaluación rápida de funciones cognitivas postictus. (AU)

Introduction: Stroke is the sixth leading cause of disability in Spain. Patients may present motor, sensory, or cognitive sequelae, which can be minimised with early treatment. To this end, there is a need for quick-to-administer assessment tools to evaluate deficits in these areas. The Oxford Cognitive Screen (OCS) is a brief test specifically designed to assess cognitive function in patients with stroke. Our aim in this study is to report the linguistic and cultural adaptation of a Spanish-language version of the test (OCS-S).Material and methodsThe linguistic validation was conducted with a process of double translation and 10 consensus meetings of the multidisciplinary research team. We also performed 3 pilot studies, with 5 potential users, 23 healthy individuals, and 23 patients with stroke (ischaemic in 61% of cases and haemorrhagic in 39%), respectively; participants were aged between 31 and 88 years.ResultsThe OCS-S includes the 10 subtests, the coding of responses, and the scoring system from the original version. We modified and extended the instructions for administration in order to ensure the reliability of the content and its application. Five tasks were modified (images, numbers, and sentences) and the praxis subtest was modified to evaluate both hands. The pilot studies confirmed comprehension in the target population, independently of any cognitive problems.ConclusionsThe OCS-S is conceptually and linguistically equivalent to the original test, enabling psychometric assessment and application of the test in the Spanish population. The OCS-S may be a useful screening tool for quickly assessing cognitive function after stroke. (AU)

Cultural and linguistic adaptation of the Oxford Cognitive Screen to the Spanish population.

INTRODUCTION: Stroke is the sixth leading cause of disability in Spain. Patients may present motor, sensory, or cognitive sequelae, which can be minimised with early treatment. To this end, there is a need for quick-to-administer assessment tools to evaluate deficits in these areas. The Oxford Cognitive Screen (OCS) is a brief test specifically designed to assess cognitive function in patients with stroke. Our aim in this study is to report the linguistic and cultural adaptation of a Spanish-language version of the test (OCS-S). METHODS: The linguistic validation was conducted with a process of double translation and 10 consensus meetings of the multidisciplinary research team. We also performed 3 pilot studies, with 5 potential users, 23 healthy individuals, and 23 patients with stroke (ischaemic in 61% of cases and haemorrhagic in 39%), respectively; participants were aged between 31 and 88 years. RESULTS: The OCS-S includes the 10 subtests, the coding of responses, and the scoring system from the original version. We modified and extended the instructions for administration in order to ensure the reliability of the content and its application. Five tasks were modified (images, numbers, and sentences) and the praxis subtest was modified to evaluate both hands. The pilot studies confirmed comprehension in the target population, independently of any cognitive problems. CONCLUSION: The OCS-S is conceptually and linguistically equivalent to the original test, enabling psychometric assessment and application of the test in the Spanish population. The OCS-S may be a useful screening tool for quickly assessing cognitive function after stroke.

Cultural and linguistic adaptation of the Oxford Cognitive Screen to the Spanish population. / Adaptación lingüística y cultural del Oxford Cognitive Screen (OCS) en población española.

INTRODUCTION: Stroke is the sixth leading cause of disability in Spain. Patients may present motor, sensory, or cognitive sequelae, which can be minimised with early treatment. To this end, there is a need for quick-to-administer assessment tools to evaluate deficits in these areas. The Oxford Cognitive Screen (OCS) is a brief test specifically designed to assess cognitive function in patients with stroke. Our aim in this study is to report the linguistic and cultural adaptation of a Spanish-language version of the test (OCS-S). MATERIAL AND METHODS: The linguistic validation was conducted with a process of double translation and 10 consensus meetings of the multidisciplinary research team. We also performed 3 pilot studies, with 5 potential users, 23 healthy individuals, and 23 patients with stroke (ischaemic in 61% of cases and haemorrhagic in 39%), respectively; participants were aged between 31 and 88 years. RESULTS: The OCS-S includes the 10 subtests, the coding of responses, and the scoring system from the original version. We modified and extended the instructions for administration in order to ensure the reliability of the content and its application. Five tasks were modified (images, numbers, and sentences) and the praxis subtest was modified to evaluate both hands. The pilot studies confirmed comprehension in the target population, independently of any cognitive problems. CONCLUSIONS: The OCS-S is conceptually and linguistically equivalent to the original test, enabling psychometric assessment and application of the test in the Spanish population. The OCS-S may be a useful screening tool for quickly assessing cognitive function after stroke.

A Danish version of the Oxford cognitive screen: a stroke-specific screening test as an alternative to the MoCA.

Cognitive deficits are common following stroke and have many negative consequences. They must be identified to provide appropriate interventions and care. In Denmark, the Montreal Cognitive Assessment (MoCA), a dementia screening tool, is commonly used to screen for cognitive deficits following stroke, despite its limitations in this context. This study aimed to make the Oxford Cognitive Screen (OCS), a stroke-specific cognitive screening tool, available in Danish and to provide population appropriate normative data. Additionally, the study aimed to evaluate the appropriateness of the MoCA cutoff of 25/26 currently used in Denmark. A sample of healthy Danish participants aged 36-89 was assessed using the Danish OCS and MoCA. Mean performance and 5th percentile cutoffs were calculated for both tests. OCS results were similar to results from European studies. For the MoCA, 5th percentile corresponded to 22.35, suggesting that the cutoff currently used in Denmark is inappropriate.

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

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; rs = 0.693 to 1.000), and acceptable-good for intra-reliability (ICC = 0.181 to 0.990) and test-retest reliability ( rs = 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 ( rs = -0.193 to 0.95) and low-moderate ( rs = -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.

Oxford Cognitive Screen - Brazilian Portuguese version (OCS-Br) A pilot study.

Cognitive impairment is very common in stroke patients and underdiagnosed. Symptoms such as language, praxis, visuospatial, visuoconstructive and memory impairment are prominent. The screening cognitive tests available do not address some specific characteristics of stroke patients and have major limitations in relation to the most impaired cognitive domains. OBJECTIVE: To test the applicability of a Brazilian version of the Oxford Cognitive Screen in a convenience sample of individuals with normal cognition. METHODS: Thirty neurologically healthy participants underwent the OCS-Br in this pilot study. RESULTS: The mean score on each task was: naming: 3.4 (SD=0.72) (maximum value of 4); semantics: 3 (SD=0) (maximum 3); orientation: 4 (SD=0) (maximum 4); visual field: 4 (SD=0) (maximum 4); sentence reading: 14.53 (SD: 1) (maximum 15); number writing: 2.86 (0.6) (maximum 3); calculation: 3.8 (SD=0.48) (maximum 4); and accuracy on the broken hearts test: 47.3 (3.3) (maximum 50). The scores obtained were similar to those of the English original sample. CONCLUSION: We observed similar values on each separate OCS task in comparison to the original test, confirming that the Brazilian Portuguese version is comparable to other studies.

O comprometimento cognitivo é muito comum em pacientes com AVC e pouco diagnosticado. Déficits cognitivos envolvendo as funções de linguagem, praxia, habilidades visuoespaciais, visuoconstrutivas e memória são proeminentes. Os testes de avaliação cognitiva disponíveis não abordam algumas características específicas dos pacientes com AVC e apresentam limitação importante em relação aos domínios cognitivos mais comprometidos. OBJETIVO: Testar a aplicabilidade de uma versão brasileira do Oxford Cognitive Screen em uma amostra de conveniência com indivíduos sem prejuízo cognitivo. MÉTODOS: Trinta participantes neurologicamente saudáveis foram submetidos ao OCS-Br neste estudo piloto. RESULTADOS: O escore médio em cada tarefa foi: nomeação: 3,4 (DP=0,72) (valor máximo de 4); semântica: 3 (DP=0) (máximo de 3); orientação: 4 (DP=0) (máximo de 4); campo visual: 4 (DP=0) (máximo de 4); leitura de sentenças: 14,53 (DP: 1) (máximo de 15); número escrito: 2,86 (0,6) (máximo de 3); cálculo: 3,8 (DP=0,48) (máximo de 4); precisão no teste de corações partidos: 47,3 (3,3) (máximo de 50). Os escores foram semelhantes aos da amostra original. CONCLUSÃO: Observamos valores similares em cada tarefa separada do OCS em comparação ao teste original, o que torna a versão em português brasileiro comparável a outros estudos, e todos os itens foram bem compreendidos com potencial de usabilidade em nosso país.

Oxford Cognitive Screen - Brazilian Portuguese version (OCS-Br): a pilot study / Oxford Cognitive Scale - versão em português do Brasil (OCS-BR): um estudo piloto

ABSTRACT Cognitive impairment is very common in stroke patients and underdiagnosed. Symptoms such as language, praxis, visuospatial, visuoconstructive and memory impairment are prominent. The screening cognitive tests available do not address some specific characteristics of stroke patients and have major limitations in relation to the most impaired cognitive domains. Objective: To test the applicability of a Brazilian version of the Oxford Cognitive Screen in a convenience sample of individuals with normal cognition. Methods: Thirty neurologically healthy participants underwent the OCS-Br in this pilot study. Results: The mean score on each task was: naming: 3.4 (SD=0.72) (maximum value of 4); semantics: 3 (SD=0) (maximum 3); orientation: 4 (SD=0) (maximum 4); visual field: 4 (SD=0) (maximum 4); sentence reading: 14.53 (SD: 1) (maximum 15); number writing: 2.86 (0.6) (maximum 3); calculation: 3.8 (SD=0.48) (maximum 4); and accuracy on the broken hearts test: 47.3 (3.3) (maximum 50). The scores obtained were similar to those of the English original sample. Conclusion: We observed similar values on each separate OCS task in comparison to the original test, confirming that the Brazilian Portuguese version is comparable to other studies.

RESUMO O comprometimento cognitivo é muito comum em pacientes com AVC e pouco diagnosticado. Déficits cognitivos envolvendo as funções de linguagem, praxia, habilidades visuoespaciais, visuoconstrutivas e memória são proeminentes. Os testes de avaliação cognitiva disponíveis não abordam algumas características específicas dos pacientes com AVC e apresentam limitação importante em relação aos domínios cognitivos mais comprometidos. Objetivo: Testar a aplicabilidade de uma versão brasileira do Oxford Cognitive Screen em uma amostra de conveniência com indivíduos sem prejuízo cognitivo. Métodos: Trinta participantes neurologicamente saudáveis foram submetidos ao OCS-Br neste estudo piloto. Resultados: O escore médio em cada tarefa foi: nomeação: 3,4 (DP=0,72) (valor máximo de 4); semântica: 3 (DP=0) (máximo de 3); orientação: 4 (DP=0) (máximo de 4); campo visual: 4 (DP=0) (máximo de 4); leitura de sentenças: 14,53 (DP: 1) (máximo de 15); número escrito: 2,86 (0,6) (máximo de 3); cálculo: 3,8 (DP=0,48) (máximo de 4); precisão no teste de corações partidos: 47,3 (3,3) (máximo de 50). Os escores foram semelhantes aos da amostra original. Conclusão: Observamos valores similares em cada tarefa separada do OCS em comparação ao teste original, o que torna a versão em português brasileiro comparável a outros estudos, e todos os itens foram bem compreendidos com potencial de usabilidade em nosso país.

Using the Oxford Cognitive Screen to Detect Cognitive Impairment in Stroke Patients: A Comparison with the Mini-Mental State Examination.

BACKGROUND: The Oxford Cognitive Screen (OCS) was recently developed with the aim of describing the cognitive deficits after stroke. The scale consists of 10 tasks encompassing five cognitive domains: attention and executive function, language, memory, number processing, and praxis. OCS was devised to be inclusive and un-confounded by aphasia and neglect. As such, it may have a greater potential to be informative on stroke cognitive deficits of widely used instruments, such as the Mini-Mental State Examination (MMSE) or the Montreal Cognitive Assessment, which were originally devised for demented patients. OBJECTIVE: The present study compared the OCS with the MMSE with regards to their ability to detect cognitive impairments post-stroke. We further aimed to examine performance on the OCS as a function of subtypes of cerebral infarction and clinical severity. METHODS: 325 first stroke patients were consecutively enrolled in the study over a 9-month period. The OCS and MMSE, as well as the Bamford classification and NIHSS, were given according to standard procedures. RESULTS: About a third of patients (35.3%) had a performance lower than the cutoff (<22) on the MMSE, whereas 91.6% were impaired in at least one OCS domain, indicating higher incidences of impairment for the OCS. More than 80% of patients showed an impairment in two or more cognitive domains of the OCS. Using the MMSE as a standard of clinical practice, the comparative sensitivity of OCS was 100%. Out of the 208 patients with normal MMSE performance 180 showed impaired performance in at least one domain of the OCS. The discrepancy between OCS and MMSE was particularly strong for patients with milder strokes. As for subtypes of cerebral infarction, fewer patients demonstrated widespread impairments in the OCS in the Posterior Circulation Infarcts category than in the other categories. CONCLUSION: Overall, the results showed a much higher incidence of cognitive impairment with the OCS than with the MMSE and demonstrated no false negatives for OCS vs MMSE. It is concluded that OCS is a sensitive screen tool for cognitive deficits after stroke. In particular, the OCS detects high incidences of stroke-specific cognitive impairments, not detected by the MMSE, demonstrating the importance of cognitive profiling.

Italian normative data for a stroke specific cognitive screening tool: the Oxford Cognitive Screen (OCS).

Cognitive deficits occur in most stroke patients and cognitive impairment is an important predictor of adverse long term outcome. However, current screening measures, such as the Mini Mental State Examination or the Montreal Cognitive Assessment, do not provide information tuned for evaluating the impact of cognitive impairment in the early phase after stroke. The Oxford Cognitive Screen (OCS) represents an important new development in this regard. The OCS is now available for assessment of Italian individuals and the aim of this study is to standardize the OCS on a large sample of healthy Italian participants stratified for age, gender and education level. Results confirmed the influence of these factors in several of the OCS tasks. Age-, education- and gender-adjusted norms are provided for the ten sub-tests of the test. The availability of normative data represents an important prerequite for the reliable use of OCS with stroke patients.

The Hong Kong version of the Oxford Cognitive Screen (HK-OCS): validation study for Cantonese-speaking chronic stroke survivors.

This study reports the validation of the Hong Kong version of Oxford Cognitive Screen (HK-OCS). Seventy Cantonese-speaking healthy individuals participated to establish normative data and 46 chronic stroke survivors were assessed using the HK-OCS, Albert's Test of Visual Neglect, short test of gestural production, and Hong Kong version of the following assessments: Western Aphasia Battery, MMSE, MoCA, Modified Barthel Index, and Lawton Instrumental Activities of Daily Living scale. The validity of the HK-OCS was appraised by the difference between the two participant groups. Neurologically unimpaired individuals performed significantly better than stroke survivors on the HK-OCS. Positive and significant correlations found between cognitive subtests in the HK-OCS and related assessments indicated good concurrent validity. Excellent intra-rater and inter-rater reliabilities, fair test-retest reliability, and acceptable internal consistency suggested that the HK-OCS had good reliability. Specific HK-OCS subtests including semantics, episodic memory, number writing, and orientation were the best predictors of functional outcomes.