Publications by authors named "Mehmet Akif Karan"

Background: Various explicit screening tools, developed mostly in central Europe and the USA, assist clinicians in optimizing medication use for older adults. The Turkish Inappropriate Medication use in oldEr adults (TIME) criteria set, primarily based on the STOPP/START criteria set, is a current explicit tool originally developed for Eastern Europe and subsequently validated for broader use in Central European settings. Reviewed every three months to align with the latest scientific literature, it is one of the most up-to-date tools available.

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Objective: This study examines the relationship between two frailty screening tools and 90-day all-cause mortality in geriatric inpatients.

Methods: The study included patients aged ≥60 years who were admitted to the geriatrics unit of a university hospital between June 2021 and August 2022 and whose mortality status and duration of hospitalization data were obtained from the Health Ministry System. During hospitalization, the patients were screened using two different frailty scales: the Simpler Modified Fried Frailty Scale (sMFS) and the Clinical Frailty Scale (CFS).

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Objectives: Cardiac diastolic dysfunction (left ventricular diastolic dysfunction [LVDD]) is a well-known predictor of heart failure. We hypothesized that sarcopenia is independently associated with diastolic dysfunction. We aimed to investigate the association of the most recent consensus definition of sarcopenia with LVDD.

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Objective: The prevalence of obesity by fat percentage has seen a steady increase in older adults in recent years, secondary to increases in fat mass in body composition, even in healthy aging. Malnutrition is a common geriatric syndrome with serious clinical outcomes. Increases in fat mass and waist circumference with healthy aging should not prevent the risk of malnutrition from being masked.

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Background: The Rapid Cognitive Screen (RCS) is a brief, easy to administer score screening tool for cognitive dysfunction which can be very useful for cognitive screening in busy clinical settings. We aimed to cross-culturally adapt and validate RCS in Turkish.

Methods: A total of 172 community-dwelling older participants from geriatric and neurology clinics, aged 60 and older were included.

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Objective: While the literature contains several studies on the frailty assessed during hospitalization and/or outpatient settings and nursing homes, few studies have assessed frailty in community-dwelling older adults. We investigated the prevalence of frailty and associated factors among older adults in a sample of community-dwelling older adults.

Methods: We included community-dwelling older adults >60 years living in the Fatih District of the Istanbul Province.

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Background & Aims: Sarcopenia is a well-defined geriatric syndrome and a major cause of disability and mortality. We investigate the associations of alternative sarcopenia definitions with mortality in community-dwelling older adults.

Methods: Sarcopenia was defined based on the EWGSOP1 and EWGSOP2 probable sarcopenia criteria, with standard handgrip strength (HGS) cut-offs of 30/20 kg for an EWGSOP1 definition and 27/16 kg for an EWGSOP2 definition, or alternatively, population-specific cut-offs of 35/20 kg for a EWGSOP2 definition.

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Article Synopsis
  • Sarcopenia, a common disorder in older adults, can lead to serious health issues, making regular screening essential, with the SARC-F questionnaire being the main tool recommended for assessment.
  • This study aimed to evaluate a proxy-reported version of the SARC-F questionnaire (SARC-F by proxy) to see if it effectively screens for sarcopenia in individuals who may have difficulty communicating.
  • Results showed that the performance of SARC-F by proxy was comparable to the standard SARC-F for diagnosing sarcopenia, indicating it could be a valid alternative for those unable to self-report.
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Objective: Probable sarcopenia is a predictor of functional limitation in older adults. However, whether standard thresholds recommended by guides, or population-specific thresholds better predict impairment in functionality is an issue that needs to be enlightened. We aimed to study the associations of probable sarcopenia identified by the use of EWGSOP2 and population-specific thresholds with deterioration in functionality at follow-up and give prevalences of probable sarcopenia with different thresholds in older outpatients admitted to a tertiary health center.

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Background: The relationship between vitamin D and cognitive status remains controversial. We aimed to evaluate the effect of vitamin D replacement on cognitive functions in healthy and cognitively intact vitamin D deficient older females.

Methods: This study was designed as a prospective interventional study.

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Article Synopsis
  • Falls are a significant public health issue for older adults, leading to increased health risks, costs, and the need to identify those at risk in the community.
  • A field study was conducted in Istanbul to investigate the prevalence of falls and factors associated with them among older adults aged over 60, using various assessments like the FRAIL questionnaire and cognitive tests.
  • The study utilized a range of measures to evaluate health status, functional capacity, quality of life, and risk factors related to falls, and analyzed the data using statistical tests to draw meaningful conclusions.
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  • The study aims to compare the clinical characteristics and outcomes of hospitalized patients diagnosed with COVID-19 based on PCR test results, focusing specifically on older adults.
  • A total of 601 hospitalized adults were analyzed, revealing that both PCR-positive and negative patients had similar demographics, hospitalization durations, and outcomes, with a few notable differences in symptoms.
  • The findings suggest that PCR-positive and negative cases show similar disease patterns, but PCR-negative patients may have a weaker immune response, indicated by some worse laboratory results.
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Background & Aims: Ageing brings alterations in body composition, as skeletal muscle gradually declines and accumulation of adipose tissue accompanies it. Although sarcopenia (S) and obesity (O) were separately reported to be associated with frailty and poor physical performance, whether they bring more detrimental or favorable effect when they coexist (i.e.

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Purpose: EWGSOP2 defines "probable sarcopenia" as the presence of low muscle strength without non-muscle causes. The associations of probable sarcopenia have been studied in few reports to date, and our intention in this study is to identify associations of probable sarcopenia with common geriatric syndromes in a sample of older adults who attended the geriatric outpatient clinic of Istanbul University Hospital.

Methods: The present study was designed as a retrospective cross-sectional study.

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Background: While there are substantial reports on the acute phase of Covid-19, the data on post-Covid phase are limited.

Aim: To report the data on older post-Covid patients comparatively with the young adults.

Study Design: Retrospective, single-center study in post-Covid outpatient clinic.

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Frailty is a common geriatric syndrome that indicates homeostenosis and increased risk of disability and mortality. It is amenable to intervention when detected. Hence, screening frailty is of utmost importance to preserve quality-of-life and function in older age.

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Background And Objective: Hypertension is the most prevalent chronic disease in older adults. Antihypertensive drug use increases with aging. In some studies, hypotension developing under antihypertensive medication use has been indicated as a potential risk factor for morbidity and mortality in older adults.

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Objectives: There are studies on associations between obesity and mortality in nursing home (NH) residents, but the presence of concomitant muscle weakness has not been examined. We considered that self-reported weakness might be a low muscle strength proxy marker. We aimed to examine associations of obesity alone, self-reported muscle weakness alone, and their combination with mortality in NH residents.

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Article Synopsis
  • The study investigates the link between the ACTN3 R577X gene and sarcopenia in Turkish adults aged 65 and older, an issue common in geriatrics.
  • It involved 197 participants, measuring various health metrics, with findings indicating no strong association between the gene polymorphism and indicators of sarcopenia.
  • The research suggests that gender may influence low muscle mass more significantly than the ACTN3 gene, highlighting the need for further research on ethnic impacts on muscle health in older populations.
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Background: Sarcopenia is associated with an increased likelihood of major adverse health outcomes. Therefore, screening and early and timely identification of sarcopenia are essential. EWGSOP2 (European Working Group on Sarcopenia in Older People2) suggests Ishii screening test for formal-case findings.

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Objectives: A preserved ambulation is one of the keypoints for functionality and polypharmacy, a common problem in older adults, is associated with worse functional status. Our aim was to examine the associations of polypharmacy with certain physical performance measures used to evaluate ambulation.

Methods: This retrospective, cross-sectional study was conducted in a geriatric outpatient clinic.

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Objectives: Sodium-glucose co-transporter-2 (SGLT-2) inhibitors have been recently introduced for type 2 diabetes treatment with significant cardiovascular, renal benefits. Yet, they have frequently been refrained in older adults. Metformin is regarded the first-line diabetes therapy for all ages; still it is associated with weight loss and frailty in older adults.

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