First Institute of Health Service

Tokyo, Japan

First Institute of Health Service

Tokyo, Japan
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Fujishima Y.,Iwate Medical University | Ohsawa M.,Iwate Medical University | Itai K.,Iwate Medical University | Kato K.,San ai Hospital | And 5 more authors.
Blood Purification | Year: 2011

Serum selenium levels have been thought to be decreased in hemodialysis patients; however, results of previous studies have been inconsistent. Population-based hemodialysis patients (n = 1,041) and randomly recruited healthy controls (n = 384) were enrolled. Serum selenium levels were determined by inductively coupled plasma mass spectrometry and compared in hemodialysis patients and controls using analysis of covariance after adjustment for confounding factors with p < 0.1 as the result of the multiple regression analysis. Age, serum albumin levels, hsCRP levels, LDLC levels, HDLC levels, regular drinking habit and hemodialysis treatment were significantly associated with serum selenium levels in multiple regression analysis. Multivariate- adjusted means (95% CIs) of serum selenium levels were 103 μg/l (101-105) in hemodialysis patients and 117 μg/l (114-121) in controls. Selenium levels in hemodialysis patients were decreased. Whether decreased serum selenium levels contribute to increased risks for morbidity and mortality in hemodialysis patients should be examined. © 2011 S. Karger AG, Basel.

Shay C.M.,Northwestern University | Van Horn L.,Northwestern University | Stamler J.,Northwestern University | Dyer A.R.,Northwestern University | And 8 more authors.
American Journal of Clinical Nutrition | Year: 2012

Background: Clinical trial data show that reduction in total energy intake enhances weight loss regardless of the macronutrient composition of the diet. Few studies have documented dietary patterns or nutrient intakes that favor leanness [BMI (in kg/m 2) ≤25] in free-living populations. Objective: This investigation examined associations of usual energy, food, and nutrient intakes with BMI among US participants of the International Study of Macro-/Micronutrients and Blood Pressure (INTERMAP). Design: The INTERMAP is an international cross-sectional study of dietary factors and blood pressure in men and women (ages 40-59 y) that includes 8 US population samples. The present study included data from 1794 Americans who were not consuming a special diet and who provided four 24-h dietary recalls and 2 timed 24-h urine collections. Multivariable linear regression with the residual method was used to adjust for energy intake; sex-specific associations were assessed for dietary intakes and urinary excretions with BMI adjusted for potential confounders including physical activity. Results: Lower energy intake was associated with lower BMI in both sexes. Univariately, higher intakes of fresh fruit, pasta, and rice and lower intakes of meat were associated with lower BMI; these associations were attenuated in multivariable analyses. Lower urinary sodium and intakes of total and animal protein, dietary cholesterol, saturated fats, and heme iron and higher urinary potassium and intakes of carbohydrates, dietary fiber, and magnesium were associated with lower BMI in both sexes. Conclusion: The consumption of foods higher in nutrient-dense carbohydrate and lower in animal protein and saturated fat is associated with lower total energy intakes, more favorable micronutrient intakes, and lower BMI. © 2012 American Society for Nutrition.

Miura K.,Shiga University of Medical Science | Okuda N.,Shiga University of Medical Science | Turin T.C.,Shiga University of Medical Science | Takashima N.,Shiga University of Medical Science | And 5 more authors.
Journal of Epidemiology | Year: 2010

Background: The relationship between dietary salt intake and blood pressure (BP) has been rarely investigated in a large population of Japanese. The characteristics of nutrients intake and foods intake in Japanese people with high salt intake have also not investigated well. Methods: Data of 10 422 participants (4585 men and 5837 women) aged 30 or older who participated in both the National Survey on Circulatory Disorders and National Nutrition Survey in Japan conducted in 1980 were used. The nutrition surveys were performed with weighing record method for three consecutive days to each household. BP and intakes of nutrients and foods were compared by the quintiles of estimated individual salt intake per day. Analyses of covariance were used to calculate multivariate-adjusted mean BP values by the quintiles. Results: Participants with higher salt intake showed higher intakes of soy beans/legume, fruit, other vegetables, and fish/shellfish. Intakes of protein, potassium, calcium, iron, magnesium, and fiber were higher in higher quintiles of salt intake. In men, adjusted systolic BPs were higher in the higher salt intake quintiles; there was 4.3mmHg difference in multivariate-adjusted systolic BP between the lowest quintile (mean salt intake 8.7 g/day) and the highest quintile (mean salt intake 23.5 g/day) (P < 0.001). In women, adjusted mean systolic BPs were not statistically different among the quintile of salt intake. Conclusions: A positive relationship of dietary salt intake to BP was observed, especially in men, in this largescale representative Japanese population. © 2010 by the Japan Epidemiological Association.

Miura K.,Shiga University of Medical Science | Stamler J.,Northwestern University | Brown I.J.,Imperial College London | Ueshima H.,Shiga University of Medical Science | And 11 more authors.
Journal of Hypertension | Year: 2013

Objective: In short-term feeding trials, replacement of other macronutrients with monounsaturated fatty acid reduces blood pressure. However, observational studies have not clearly demonstrated a relationship between monounsaturated fatty acid intake and blood pressure. We report associations of monounsaturated fatty acid intake of individuals with blood pressure in a cross-sectional study. Methods: The International Study of Macro/Micronutrients and Blood Pressure is a cross-sectional epidemiologic study of 4680 men and women ages 40-59 years from 17 population samples in China, Japan, UK and USA. Nutrient intake data were based on four in-depth multipass 24-h dietary recalls/person and two-timed 24-h urine collections/person. Blood pressure was measured eight times at four visits. Results: Mean monounsaturated fatty acid intake ranged from 8.1%kcal (China) to 12.2%kcal (USA). With sequential models to control for possible confounders (dietary, other), linear regression analyses showed significant inverse relationship of total monounsaturated fatty acid intake with DBP for all participants; for 2238 'nonintervened' individuals, the relationship was stronger. Estimated DBP differences with 2-SD higher monounsaturated fatty acids (5.35%kcal) were-0.82 mmHg (P < 0.05) for all participants and-1.70 mmHg (P < 0.01) for nonintervened individuals. Inverse associations of dietary total oleic acid (main monounsaturated) with blood pressure in nonintervened individuals were not significant, but those of oleic acid from vegetable sources were stronger and significant (P < 0.05). Conclusion: Dietary monounsaturated fatty acid intake, especially oleic acid from vegetable sources, may contribute to prevention and control of adverse blood pressure levels in general populations. © 2013 Lippincott Williams & Wilkins.

Nakamura K.,Kanazawa Medical University | Nakamura K.,Shiga University of Medical Science | Okamura T.,National Cardiovascular Center | Hayakawa T.,Fukushima Medical University | And 3 more authors.
Hypertension Research | Year: 2010

Hypertension and smoking are major causes of disability and death, especially in the Asia-Pacific region, where there is a high prevalence of a combination of these two risk factors. We attempted to measure the medical expenditures of a Japanese male population with hypertension and/or a smoking habit over a 10-year period of follow-up. A cohort study was conducted that investigated the medical expenditures due to a smoking habit and/or hypertension during the decade of the 1990s using existing data on physical status and medical expenditures. The participants included 1708 community-dwelling Japanese men, aged 40-69 years, who were classified into the following four categories: neither smoking habit nor hypertension, smoking habit alone, hypertension alone or both smoking habit and hypertension. Hypertension was defined as a systolic blood pressure of 140 mm Hg, a diastolic blood pressure of 90 mm Hg or taking antihypertensive medications. In the study cohort, 24.9% had both a smoking habit and hypertension. During the 10-year follow-up period, participants with a smoking habit alone (18 444 Japanese yen per month), those with hypertension alone (21 252 yen per month) and those with both a smoking habit and hypertension (31 037 yen per month) had increased personal medical expenditures compared with those without a smoking habit and hypertension (17 418 yen per month). Similar differences were observed even after adjustment for other confounding factors (P<0.01). Japanese men with both a smoking habit and hypertension incurred higher medical expenditures compared with those without a smoking habit, hypertension or their combination. © 2010 The Japanese Society of Hypertension All rights reserved.

Asayama K.,Catholic University of Leuven | Asayama K.,Tohoku University | Satoh M.,Tohoku University | Murakami Y.,Shiga University of Medical Science | And 10 more authors.
Hypertension | Year: 2014

To evaluate the cardiovascular mortality risk in association with blood pressure level among people with and without antihypertensive treatment, we performed the participant-level meta-analysis that included 39 705 Japanese from 6 cohorts (58.4% women; mean age, 60.1 years; 20.4% treated). Multivariable-adjusted Cox models were used to analyze the risk of cardiovascular mortality and its subtypes among 6 blood pressure levels according to recent guidelines, optimal to Grade 3 hypertension, and the usage of antihypertensive medication at baseline. During median 10.0 years of follow-up, there were 2032 cardiovascular deaths (5.1 per 1000 person-years), of which 410 deaths were coronary heart disease, 371 were heart failure, and 903 deaths were stroke. Treated participants had significantly higher risk for cardiovascular mortality (hazard ratios, 1.50; 95% confidence intervals, 1.36-1.66), coronary heart disease (hazard ratios, 1.53; confidence intervals, 1.23-1.90), heart failure (hazard ratios, 1.39; confidence intervals, 1.09-1.76), and stroke (hazard ratios, 1.48; confidence intervals, 1.28-1.72) compared with untreated people. Among untreated participants, the risks increased linearly with an increment of blood pressure category (P≤0.011). The risk increments per blood pressure category were higher in young participants (<60 years; 22% to 79%) than those in old people (≥60 years; 7% to 15%) with significant interaction for total cardiovascular, heart failure, and stroke mortality (P≤0.026). Among treated participants, the significant linear association was also observed for cardiovascular mortality (P=0.0003), whereas no stepwise increase in stroke death was observed (P=0.19). The risks of cardiovascular mortality were ≈1.5-fold high in participants under antihypertensive medication. More attention should be paid to the residual cardiovascular risks in treated patients. © 2014 American Heart Association, Inc.

Sakurai M.,Kanazawa Medical University | Sakurai M.,Northwestern University | Saitoh S.,Sapporo Medical University | Miura K.,Shiga University of Medical Science | And 11 more authors.
Diabetes Care | Year: 2013

Objective - Associations between HbA1c and cardiovascular diseases (CVD) have been reported mainly in Western countries. It is not clear whether HbA1c measurements are useful for assessing CVD mortality risk in East Asian populations. Research Design and Methods - The risk for cardiovascular death was evaluated in a large cohort of participants selected randomly from the overall Japanese population. A total of 7,120 participants (2,962men and 4,158 women; mean age 52.3 years) free of previous CVD were followed for 15 years. Adjusted hazard ratios (HRs) and 95% CIs among categories of HbA1c (<5.0%, 5.0-5.4%, 5.5-5.9%, 6.0-6.4%, and ≥6.5%) for participants without treatment for diabetes and HRs for participants with diabetes were calculated using a Cox proportional hazards model. Results - During the study, there were 1,104 deaths, including 304 from CVD, 61 from coronary heart disease, and 127 from stroke (78 from cerebral infarction, 25 from cerebral hemorrhage, and 24 from unclassified stroke). Relations to HbA1c with all-cause mortality and CVD death were graded and continuous, and multivariate-adjusted HRs for CVD death in participants with HbA1c 6.0-6.4% and ≥6.5%were 2.18 (95% CI 1.22-3.87) and 2.75 (1.43-5.28), respectively, compared with participants with HbA1c <5.0%. Similar associations were observed between HbA1c and death from coronary heart disease and death from cerebral infarction. Conclusions - High HbA1c levels were associated with increased risk for all-cause mortality and death from CVD, coronary heart disease, and cerebral infarction in general East Asian populations, as in Western populations. © 2013 by the American Diabetes Association.

Nakamura K.,Kanazawa Medical University | Miura K.,Shiga University of Medical Science | Nakagawa H.,Kanazawa Medical University | Okamura T.,Keio University | And 6 more authors.
Journal of Hypertension | Year: 2013

OBJECTIVE: This study investigated the effect of hypertension on hospitalization risk and medical expenditure according to treatment status in a Japanese population. METHODS: A total of 314 622 beneficiaries of the medical insurance system in Japan, aged 40-69 years, without a history of cardiovascular, cerebrovascular, or end-stage renal disease were classified into seven blood pressure categories. These categories were used to compare the risk of undergoing hospitalization in the 1 year after the baseline survey and to examine the percentage of inpatient medical expenditure attributable to overall hypertension relative to total medical expenditure in the study population. RESULTS: During the follow-up period, 6.6% of men and 5.1% of women were hospitalized. In men and women aged 40-54 years, cases of hypertension, especially grade 3 untreated hypertension, led to more frequent hospitalization, compared with optimal blood pressure. Individuals who were hospitalized, especially long-term, incurred considerably higher medical expenditure compared with those who were not hospitalized, regardless of their hypertension status. In women aged 55-69 years, there was little variation in hospitalization risk across blood pressure categories. The inpatient medical expenditure attributable to overall hypertension represented 7.2 and 6.9% of the total medical expenditure for men aged 40-54 and 55-69 years, whereas it represented 2.8 and 3.8% for women, respectively. CONCLUSION: Although cases of hypertension were an economic burden especially in men, grade 3 untreated hypertension was more likely to incur extremely high medical expenditure as a result of hospitalization, compared with other cases. © 2013 Wolters Kluwer Health | Lippincott Williams &Wilkins.

Tsukinoki R.,Osaka Medical College | Okamura T.,Keio University | Watanabe M.,Japan National Cardiovascular Center Research Institute | Kokubo Y.,Japan National Cardiovascular Center Research Institute | And 6 more authors.
American Journal of Hypertension | Year: 2014

BACKGROUND Blood pressure (BP) and low-density lipoprotein cholesterol (LDL-C) are risk factors for coronary artery disease (CAD) and ischemic stroke. However, the hazards of their coexistence are not fully understood in Asian populations. We investigated whether the relationship between BP and cardiovascular disease (CVD) outcomes are modified by LDL-C level in a Japanese population.METHODS Individuals aged 30-79 years (n = 5,151) were classified into 6 groups according to LDL-C levels (<140 and ≥140mg/dL or lipid medication) and BP levels (optimal BP, prehypertension, and hypertension; reference: low LDL-C and optimal BP). Hazard ratios (HRs) were calculated after adjusting for age, high-density lipoprotein cholesterol, diabetes, smoking status, and alcohol consumption. The effect modification of LDL-C on BP-CVD association was assessed using likelihood ratio tests.RESULTS There were 264 CAD and 215 ischemic stroke events during 13 years of follow-up. With low LDL-C, the HRs of prehypertension and hypertension for CAD were 2.01 and 4.71, respectively. Similar trends of HRs were observed with high LDL-C (optimal BP = 2.09, prehypertension = 3.45, hypertension = 5.94). However, the HRs for ischemic stroke did not differ between normal and high LDL-C levels at the same BP level. The apparent effect modification of LDL-C was not observed in the BP-CVD association in either CAD (P = 0.48) or ischemic stroke (P = 0.39).CONCLUSIONS The HRs for CAD in prehypertensive and hypertensive groups were higher than those in the optimal BP group at the same LDL-C levels in a Japanese population; however, there was no statistical effect modification of LDL-C on the BP-CAD association. © 2014 American Journal of Hypertension, Ltd. All rights reserved.

PubMed | Morioka University, First Institute of Health Service, Iwate University, Iwate Health Service Association and Iwate Medical University
Type: Journal Article | Journal: Atherosclerosis | Year: 2014

Although a higher heart rate is known to be a risk factor for cardiovascular disease (CVD) events, there have been no reports concerning bradycardia. Whether lower and higher resting pulse rates (RPRs) are associated with cardiovascular risk was investigated in subjects from a community-based, prospective cohort study.After subjects with atrial fibrillation, subjects with a history of CVD, and subjects receiving antihypertensive treatment were excluded, 17,766 subjects (5958 men), aged 40-79 (mean 61.5) years, were analyzed. The RPR at baseline was categorized into four groups (RPR<60, 60-69.5, 70-79.5, 80 beats per minute (bpm)) using the average value of two consecutive measurements. The endpoint was set as the composite outcome of myocardial infarction, stroke, or sudden death.During a mean follow-up of 5.6 years, there were 213 events in men and 186 events in women. In Cox regression models, increased risks of CVD were found in the men group with RPR<60bpm, as well as the group with RPR80bpm, compared with the reference group with RPR 60-69.5bpm (hazard ratio [HR]=1.73, p=0.005 and HR=2.01, p<0.001). These increased risks were found even when adjusted for age and other CVD risk factors (HR=1.55, p=0.026 with RPR<60bpm and HR=1.72, p=0.009 with RPR80bpm). In women, there were no significant associations between RPR and CVD risk.Bradycardia, as well as a higher pulse rate, may be an independent risk factor for future cardiovascular events in apparently healthy men.

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