ArticleDementia & neuropsychologia
Accuracy and reliability of the Pfeffer Questionnaire for the Brazilian elderly population.
Article in Dementia & neuropsychologia. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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Who cites it
19 citing papers in PubMed.
- Ageing in Adults With Mild and Moderate Intellectual Disabilities in Brazil: A Biopsychosocial Comparison of Individuals With and Without Down Syndrome.Journal of intellectual disability research : JIDR · 2026Observational
- Developing strategies and quality control in the Ageing and Brain Working Study in ELSA-Brasil.Revista de saude publica · 2026Article
- Assessment of cognitive function in individuals with Down syndrome and dementia: a systematic review.Dementia & neuropsychologia · 2025Review
- Comprehensive Gerontological Assessment: An Update on the Concept and Its Evaluation Tools in Latin America and the Caribbean-A Literature Review.International journal of environmental research and public health · 2024Review
- Measures of Awareness in Alzheimer's Disease and Clinical Differences Between Groups with Preserved, Impaired, and Absent Awareness.Journal of Alzheimer's disease reports · 2024Article
- Using the cell phone while standing or walking affects balance and mobility in people with Parkinson's disease.Arquivos de neuro-psiquiatria · 2023Article
- Normative data for highly educated older adults in phonemic and semantic fluency tests.Dementia & neuropsychologia · 2023Article
- Cognitive Dysfunction of Chikungunya Virus Infection in Older Adults.Frontiers in psychiatry · 2022Article
- Case Report in the Brazilian Context: Cognitive and Behavioral Changes Following an Electric Injury.Frontiers in psychiatry · 2021Article
- Loss of functional capacity in elderly individuals with Alzheimer disease.Dementia & neuropsychologia · 2020Article
- Awareness of Functional Status: People with Alzheimer's Disease Abilities to Self-Report Impairment in Activities of Daily Living.Journal of Alzheimer's disease reports · 2020Article
- Brain networks associated with anticipatory postural adjustments in Parkinson's disease patients with freezing of gait.NeuroImage. Clinical · 2020Article
- Functional capacity as a predictor of postoperative delirium in transurethral resection of prostate patients in Northeast Brazil.Neuropsychiatric disease and treatment · 2019Article
- Hypertension, Sarcopenia, and Global Cognitive Function in Community-Dwelling Older Women: A Preliminary Study.Journal of aging research · 2018Article
- Questionnaire development and validation for designing a health telemonitoring system for frail elderly people.Digital healthArticle
- Differences in the predictors of the resilience between carers of people with young- and late-onset dementia: a comparative study.Dementia & neuropsychologiaArticle
- Physician and patient-related factors associated with inappropriate prescribing to older patients within primary care: a cross-sectional study in Brazil.Sao Paulo medical journal = Revista paulista de medicinaArticle
- What is the most appropriate handgrip strength testing protocol for sarcopenia screening in older adults with cognitive impairment?Brazilian journal of physical therapyArticle
- Patterns of impairment in decision-making capacity in Alzheimer's disease and its relationship with cognitive and clinical variables.Revista brasileira de psiquiatria (Sao Paulo, Brazil : 1999)Article
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Authors and funding
5 authors.
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Abstract
The aging population calls for instruments to assess functional and cognitive impairment in the elderly, aiming to prevent conditions that affect functional abilities.
objectiveTo verify the accuracy and reliability of the Pfeffer (FAQ) scale for the Brazilian elderly population and to evaluate the reliability and reproducibility of the translated version of the Pfeffer Questionnaire.
methodsThe Brazilian version of the FAQ was applied to 110 elderly divided into two groups. Both groups were assessed by two blinded investigators at baseline and again after 15 days. In order to verify the accuracy and reliability of the instrument, sensitivity and specificity measurements for the presence or absence of functional and cognitive decline were calculated for various cut-off points and the ROC curve. Intra and inter-examiner reliability were assessed using the Interclass Correlation Coefficient (ICC) and Bland-Altman plots.
resultsFor the occurrence of cognitive decline, the ROC curve yielded an area under the curve of 0.909 (95%CI of 0.845 to 0.972), sensitivity of 75.68% (95%CI of 93.52% to 100%) and specificity of 97.26%. For the occurrence of functional decline, the ROC curve yielded an area under the curve of 0.851 (95%CI of 64.52% to 87.33%) and specificity of 80.36% (95%CI of 69.95% to 90.76%). The ICC was excellent, with all values exceeding 0.75. On the Bland-Altman plot, intra-examiner agreement was good, with p>0.05consistently close to 0. A systematic difference was found for inter-examiner agreement.
conclusionThe Pfeffer Questionnaire is applicable in the Brazilian elderly population and showed reliability and reproducibility compared to the original test.
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