Publications by authors named "Izuru Masuda"

The association between subjective walking speed and metabolic diseases has received limited attention, particularly in individuals with obesity. We aimed to clarify this association using comprehensive health checkup data of participants with obesity. In total, 8578 individuals with a body mass index ≥ 25.

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Background: Little is known about whether central airway morphological changes beyond traction bronchiectasis develop and affect clinical outcomes in patients with idiopathic pulmonary fibrosis (IPF). This study aimed to compare central airway structure comprehensively between patients with IPF, subjects with interstitial lung abnormality (ILA), and those without ILA (control) using computed tomography (CT). We further examined the prognostic impact of IPF-specific CT airway parameters in patients with IPF.

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Article Synopsis
  • The JPAD trial studied the long-term effects of low-dose aspirin on gastrointestinal symptoms and bleeding in diabetic patients, comparing those taking aspirin to those not taking it.
  • Among 2535 participants, the aspirin group experienced a significantly higher rate of gastrointestinal issues, with 8.8% compared to 5.7% in the no-aspirin group at 18 years.
  • The risk was notably higher within the first 3 years, particularly for buffered aspirin, suggesting that these factors should influence decisions on starting and continuing low-dose aspirin for prevention.
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Objective: This study aimed to identify the amount of weight loss needed in patients with obesity to improve metabolic syndrome (MetS), a risk factor for cardiovascular disease (CVD), over a long period of time.

Methods: A total of 576 patients with obesity were enrolled in this study. Effects of continuous physician-supervised weight loss on the cumulative MetS components excluding abdominal circumference (defined as obesity-related CVD risk score) were investigated during a 5-year follow-up period.

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Aim: Body mass index and waist circumference are used for obesity diagnosis and screening of visceral fat; however, their evidence in older adults is insufficient. This study investigated the age-specific association of body mass index and waist circumference with metabolic diseases, assessing their applicability as diagnostic criteria for individuals aged ≥65 years.

Methods: Analysis included 46,324 individuals aged ≥18 years, categorized into five age groups: 18-44, 45-54, 55-64, 65-74, and ≥75 years.

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Background: Low respiratory function in young adulthood is one of the important factors in the trajectory leading to the future development of COPD, but its morphological characteristics are not well characterised.

Methods: We retrospectively enrolled 172 subjects aged 40-49 years with ≥10 pack-years smoking history who underwent lung cancer screening by computed tomography (CT) and spirometry at two Japanese hospitals. Emphysema was visually assessed according to the Fleischner Society guidelines and classified into two types: centrilobular emphysema (CLE) and paraseptal emphysema (PSE).

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Background: Effective use of lung volume data measured on computed tomography (CT) requires reference values for specific populations. This study examined whether an equation previously generated for multiple ethnic groups in the United States, including Asians predominantly composed of Chinese people, in the Multi-Ethnic Study of Atherosclerosis (MESA) could be used for Japanese people and, if necessary, to optimize this equation. Moreover, the equation was used to characterize patients with chronic obstructive pulmonary disease (COPD) and lung hyperexpansion.

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Introduction: The EAGLE-DH study assessed the efficacy and safety of esaxerenone in hypertensive patients with diabetes mellitus receiving sodium-glucose cotransporter 2 (SGLT2) inhibitors.

Methods: In this multicenter, open-label, prospective, interventional study, esaxerenone was started at 1.25 or 2.

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Background: Dipeptidyl Peptidase-4 (DPP-4) inhibitors do not suppress cardiovascular events in diabetic patients with a history of cardiovascular disease. However, the effect of DPP-4 inhibitors on cardiovascular events in Japanese diabetic patients is unclear. Therefore, we investigated whether DPP-4 inhibitors alter the incidence of cardiovascular events in Japanese diabetic patients without a history of cardiovascular events.

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Background: Several guidelines recommend the measurement of N-terminal pro-B-type natriuretic peptide (NT-proBNP) to diagnose heart failure (HF); however, no screening criteria for measuring NT-proBNP in asymptomatic patients exist. We develop/validate a clinical prediction model for elevated NT-proBNP to support clinical outpatient decision-making.

Methods: In this multicenter cohort study, we used a derivation cohort (24 facilities) from 2017 to 2021 and a validation cohort at one facility from 2020 to 2021.

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Background: Sex and aging may affect the airway tree structure in patients with airway diseases and even healthy subjects. Using chest computed tomography (CT), this study sought to determine whether age is associated with airway morphological features differently in healthy males and females.

Methods: This retrospective cross-sectional study consecutively incorporated lung cancer screening CT data of asymptomatic never smokers (n = 431) without lung disease history.

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Background: Physiological and prognostic associations of centrilobular emphysema (CLE) and paraseptal emphysema (PSE) in smokers with and without chronic obstructive pulmonary disease (COPD) have been increasingly recognized, but the associations with extrapulmonary abnormalities, such as muscle wasting, osteoporosis, and cardiovascular diseases, remain unestablished.

Objectives: The aim of the study was to investigate whether CLE was associated with extrapulmonary abnormalities independent of concomitant PSE in smokers without airflow limitation.

Methods: This retrospective study consecutively enrolled current smokers without airflow limitation who underwent lung cancer screening with computed tomography and spirometry.

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Background: Two spirometry criteria have been proposed for early chronic obstructive pulmonary disease (COPD) in young smokers: 1) forced expiratory volume in 1 s (FEV)/forced vital capacity (FVC) < the lower limit of normal (LLN), and 2) FEV decline ≥60 ml/year. These criteria have yet to be validated. This study explored clinical factors associated with these two spirometry criteria.

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Dysanapsis, a mismatch between airway tree caliber and lung size, contributes to a large variation in lung function on spirometry in healthy subjects. However, it remains unclear whether other morphological features of the airway tree could be associated with the variation in lung function independent of dysanapsis. This study used lung cancer screening chest computed tomography (CT) and spirometry data from asymptomatic never smokers.

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Article Synopsis
  • * The research analyzed data from over 10,000 subjects aged 40 and older, focusing on those with definite PRISm confirmed by multiple tests versus incident PRISm confirmed by only one test.
  • * Results indicate that definite PRISm is linked to a higher prevalence of metabolic syndrome and other health issues and has a significantly greater chance of transitioning to AFL compared to individuals with normal spirometry.
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Article Synopsis
  • Centrilobular emphysema (CLE) and paraseptal emphysema (PSE) are types of lung damage often found in smokers who show preserved ratio impaired spirometry (PRISm), but their prevalence and effects aren't clearly understood yet.
  • A study conducted across multiple centers found that PRISm was present in about 8.2% of never-smokers and 11.3% of smokers, with similar rates of CLE and PSE in smokers compared to those with normal lung function.
  • The research indicated that while both CLE and PSE are common in smokers with PRISm, only CLE was linked to reduced lung function and air-trapping, highlighting a distinction in how these two
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There is little evidence of how blood pressure level over 10 years affects the decline of estimated glomerular filtration rate (eGFR) in diabetic patients. The Japanese primary prevention of atherosclerosis with aspirin for diabetes (JPAD) trial was a multicenter, randomized, clinical trial done from 2002 to 2008. After completion of the JPAD trial, we followed up the patients until 2019 as a cohort study.

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Introduction: The incidence of atrial fibrillation (AF), a significant risk factor for cardiovascular disease (CVD), is increasing worldwide. Type 2 diabetes mellitus (T2D) and advanced age are recognized as major risk factors for AF, but herein, we evaluated the incidence of AF in elderly patients with T2D and compared the prognosis between these patients with/without AF.

Research Design And Methods: The Japanese Primary Prevention of Atherosclerosis with Aspirin for Diabetes (JPAD2) study is a follow-up cohort study of the JPAD trial, a randomized controlled clinical trial initiated in 2002 in 2535 Japanese patients with T2D, to examine whether low-dose aspirin prevents CVD.

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Objectives: With an increase in globalization, the number of non-native-speaking citizens and tourists visiting local pharmacies is rapidly growing worldwide, creating linguistic and sociological problems. The aim of this study is to compare the effect of adding our original method, Original MethOd at pharmacy To ENhAnce Support for Health Improvement (OMOTENASHI), to the conventional medication counselling method (CMC) when counselling non-Japanese patients at the pharmacy.

Methods: The OMOTENASHI consists of tools written in multiple languages and illustrations to clarify the effects and side effects, and to confirm patients' understanding.

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Among individuals with hypertension, the prevalence of secondary hypertension has been reported to be ≈10%. More than half of individuals with secondary hypertension have associated hyperaldosteronism. However, given the current clinical environment, these patients often remain undiagnosed.

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Air pollution causes hypertension, cardiovascular disease, and mortality. Asian dust (AD) reportedly induces asthma or acute myocardial infarction along with air pollution, but its impact on blood pressure (BP) is unknown. We investigated the association between short-term AD exposure and BP fluctuations in 300,952 individuals whose BP was measured during April 2005-March 2015 and divided them into AD and non-AD groups based on visitation for AD-related events.

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Background: The antitumor effect of statins has been highlighted, but clinical study results remain inconclusive. While patients with diabetes are at high risk of cancer, it is uncertain whether statins are effective for cancer chemoprevention in this population.

Objective: This study evaluated the association between statins and cancer incidence/mortality in patients with type 2 diabetes.

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Background: Obesity is a risk factor for chronic kidney disease. Although body mass index (BMI) or waist circumference is indicators of obesity, actual measurements of visceral fat area (VFA) more accurately reflect the amount of visceral fat. We aimed to determine the most sensitive obesity indicator for predicting renal impairment among VFA, BMI, waist circumference, waist-to-height ratio, and visceral-to-subcutaneous fat ratio (VSR).

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Aims: A sodium glucose cotransporter 2 (SGLT2) inhibitor was recently found to reduce heart failure hospitalization in the EMPA-REG OUTCOME trial. We have hypothesized that autonomic nerve activity may be modulated by SGLT2 inhibition. The current study aims to investigate the impact of empagliflozin on sympathetic and parasympathetic nerve activity in patients with type 2 diabetes mellitus.

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BACKGROUNDCurrent clinical biomarkers for the programmed cell death 1 (PD-1) blockade therapy are insufficient because they rely only on the tumor properties, such as programmed cell death ligand 1 expression frequency and tumor mutation burden. Identifying reliable, responsive biomarkers based on the host immunity is necessary to improve the predictive values.METHODSWe investigated levels of plasma metabolites and T cell properties, including energy metabolism markers, in the blood of patients with non-small cell lung cancer before and after treatment with nivolumab (n = 55).

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