Publications by authors named "Tsuneo Konta"

Anemia and chronic kidney disease (CKD), which worsen bidirectionally, are associated with mortality in older adults. This study aimed to examine the association between CKD and the type of anemia and its impact on mortality in the general population. Data from a nationwide database of 203,280 individuals who participated in the annual "Specific Health Check and Guidance in Japan" evaluation between 2008 and 2011 were used.

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  • The analysis aimed to evaluate the clinical and economic effects of urine albumin-to-creatinine ratio (UACR) testing combined with estimated glomerular filtration rate testing for chronic kidney disease in non-diabetic Japanese patients compared to no testing and urine protein-creatinine ratio (UPCR) testing.
  • An economic model assessed the long-term impacts of UACR testing, focusing on costs, health benefits like reduced need for dialysis and cardiovascular events, and overall quality of life improvements.
  • Results indicated that repeated UACR testing is cost-effective relative to both no urine testing and UPCR testing, showing significant health-economic value for the non-diabetic Japanese population.
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Aims/introduction: This analysis seeks to evaluate the cost-effectiveness of urine albumin-to-creatinine ratio testing compared with urine protein-creatinine ratio testing and no urine testing for the identification of kidney damage in individuals with type 2 diabetes who have, or are at risk of, chronic kidney disease in Japan.

Materials And Methods: A health-economic model estimated the clinical and economic consequences of different tests to evaluate kidney damage in line with Japanese guidelines, taking a Japanese healthcare perspective. Differences in the diagnostic performance of tests were considered by the integration of real-world Japanese data.

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Background: Renal tubular damage plays a crucial role in the development of end-stage kidney disease, a risk factor for cardiovascular events and mortality. However, the relationship between renal tubular damage and all-cause and cardiovascular mortality rates in the general population remains unclear. To address this gap, we conducted a cohort study in the general population using the urinary β2-microglobulin-creatinine ratio (UBCR) as a marker of renal tubular damage.

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Background: Obesity indices reflect not only fat mass but also muscle mass and nutritional status in older people. Therefore, they may not accurately reflect prognosis. This study aimed to investigate associations between a body shape index (ABSI), body mass index (BMI), and mortality in the general older population.

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Introduction: Cardiovascular disease (CVD) is the leading cause of mortality in patients undergoing maintenance hemodialysis (HD), with various reported risk factors. Recovery time (RT) is a valuable indicator of post-dialysis fatigue. However, the association between RT and the onset of CVD remains unexplored.

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Background: PCI for aorto-ostial CTO remains challenging. The techniques for guidewire in aorto-ostial CTO may differ from those used in non-aorto-ostial CTOs, influenced by clinical and angiographic characteristics.

Objectives: This study aimed to assess the technical aspects and outcomes of percutaneous coronary intervention (PCI) in patients with aorto-ostial chronic total occlusion (CTO).

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  • The study aimed to investigate the relationship between serum high-density lipoprotein cholesterol (HDL-C) levels and kidney outcomes in a large sample of the general Japanese population.
  • Using data from the Japan Specific Health Checkups Study, researchers analyzed the risk of a 40% decline in estimated glomerular filtration rate (eGFR) in relation to different HDL-C levels.
  • Findings indicated that low HDL-C levels (under 60 mg/dL) were linked to an increased risk of kidney function decline, while high HDL-C levels did not show adverse effects on kidney outcomes.
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Background: In Japan, the doctor-patient relationship has traditionally been characterized by a power imbalance that may contribute to communication gaps. To date, however, the link between patients' health literacy levels and their understanding of doctors' explanations of medical conditions and treatment has yet to be fully examined in Japan.

Objective: The purpose of this study was to investigate the association between patients' health literacy level and their understanding of doctors' explanations.

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Background: Unlike systolic blood pressure (SBP), the prognostic value of diastolic blood pressure (DBP) in kidney function has not been established. We hypothesized that pulse pressure (PP), which is associated with arteriosclerosis, would affect the prognostic value of DBP.

Methods: This longitudinal study used data from the Japan Specific Health Checkups Study was conducted between 2008 and 2014.

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Introduction: Cigarette smoking is one of the most important life-modifiable risk factors for CVD events. The effect on CKD progression caused by smoking remained uncertain, while the effect on CVD had been established.

Method: The study population included participants from the specific health check and specific health guidance, an annual health check-up for all inhabitants of Japan who were aged between 40 and 74 years.

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Background: Fast eating has been positively associated with visceral fat accumulation in normal-weight individuals according to body mass index (BMI). However, previous studies have not examined energy and nutrients, or adjusted for food intake. We examined the relationship between eating speed and visceral fat accumulation, using waist circumference as an index, in middle-aged participants who were considered to be of standard weight according to BMI, with nutrient intake added as an adjustment factor.

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Objective/background: Insomnia is prevalent and is a risk factor for the development of lifestyle-related diseases and early death. To improve insomnia, it is necessary to identify the factors that affect it. This study investigated the associations between insomnia symptoms and mental, physical, and environmental factors in the general Japanese population.

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Background: We investigate whether Intensive uric acid (UA)-lowering therapy (ULT) provides increased renal protection compared with standard therapy in chronic kidney disease (CKD) patients.

Methods: This was a multicenter randomized controlled trial. Only CKD patients with hyperuricemia were included in this study.

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Japan's rapidly aging and high-mortality society necessitates a wider awareness and implementation of advance care planning. This Yamagata Cohort study investigated local residents' preferences for where they would like to spend their final days, and the underlying factors associated with those preferences with a self-administered questionnaire survey of local residents aged 40 years and over . Logistic regression analyses were used to assess those factors and, specifically, the choice of "Home" as the preferred place for end-of-life residence.

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  • - A systematic review and meta-analysis of 19 randomized controlled trials (RCTs) aimed to determine the best dialysate calcium (Ca) concentration for cardiovascular health in hemodialysis patients, comparing low-Ca (LCD) and high-Ca (HCD) treatments.
  • - Results indicated no significant differences in coronary artery calcification scores, all-cause death, or cardiovascular death between the two groups; however, LCD patients showed better cardiovascular function with lower intima-media thickness and pulse wave velocity compared to HCD patients.
  • - The analysis highlighted a lack of comprehensive RCTs on dialysate calcium concentrations, particularly those with patients using calcimimetics, underscoring the need for more research in
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Background: We aimed to examine the relationship between food group-specific intake and depression among workers in Japan.

Methods: A questionnaire survey was administered to 568 workers in 2020; 503 workers responded and 423 were included in the study. Information on sex, age, body mass index, overtime hours, sleep duration, marital status, employment position, exercise habits, smoking status, incidence of depression, and intake of energy, proteins, lipids, carbohydrates, alcohol, and specific food groups were collected.

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This cross-sectional study aimed to investigate the risk factors for low levels of subjective well-being (SWB) in the general population of Japan, specifically, the impact of the number of teeth and self-rated mastication. The surveyed population consisted of individuals aged between 40 and 79 years from Yamagata prefecture, Japan. A postal self-administered questionnaire survey of respondents lifestyles, medical history, oral health, and dietary intake, was conducted from 2017 to 2021.

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  • Chronic total occlusion (CTO) PCI is complex and varies in success rates among the three major coronary arteries due to differences in lesion characteristics.
  • The study analyzed 6,408 first-attempt CTO patients from a Japanese registry to identify predictors of unsuccessful PCI and developed a difficulty score for surgical outcomes.
  • Results showed that success rates were lowest for the left circumflex artery, with key differences in predictors of failure across arteries, and the new difficulty score outperformed the J-CTO score in forecasting PCI success.
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Objectives: This cross-sectional study investigated the factors associated with weight gain ≥ 10 kg after 20 years of age in the general Japanese population, with a focus on the number of teeth.

Materials And Methods: We included individuals aged ≥ 40 years from Yamagata prefecture, Japan from 2017-2021. A postal survey was conducted using a self-administered questionnaire; 5,940 participants were included in the final analysis.

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  • * This study analyzes data from over 27 million individuals to assess the impact of low eGFR and severe albuminuria on health outcomes like kidney failure, mortality, and cardiovascular events.
  • * Results indicate differing health risks associated with the methods of estimating kidney function, revealing significant correlations between lower eGFR and adverse health outcomes over time.
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  • - The study aimed to explore how isolated hematuria (blood in urine) affects kidney function decline, particularly looking at how proteinuria (excess protein in urine) might influence this relationship.
  • - An analysis of over 552,000 participants revealed that those with hematuria experienced a faster decline in kidney function compared to those without, particularly when proteinuria was present.
  • - The findings indicate that while hematuria alone can lead to a slight decline in kidney function, the presence of proteinuria intensifies this decline, suggesting a compounded effect on kidney health.
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  • Obesity and unhealthy lifestyles significantly contribute to liver dysfunction and proteinuria, yet previous studies lacked focus on how changes in body weight and lifestyle affect already existing conditions.
  • An analysis of 36,256 obese individuals revealed that losing at least 1 kg/m/year in BMI positively impacted the normalization of liver and protein function, with exercise and quitting alcohol further enhancing liver health outcomes.
  • The findings emphasize the importance of weight management, exercise habits, and alcohol cessation in improving liver function and mitigating proteinuria among obese individuals.
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  • Microalbuminuria is linked to serious health issues like kidney disease and cardiovascular problems, but the impact of trace proteinuria (found in dipstick tests) on kidney health is less clear.* -
  • A study involving over 306,000 participants showed that those with trace proteinuria had a significantly higher risk of developing worsened kidney function and overt proteinuria over an average follow-up of 36 months.* -
  • The findings suggest that even minor traces of protein in urine can indicate an increased likelihood of kidney decline, highlighting the importance of monitoring kidney health in the general population.*
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