論文

Purpose It is often reported that Na intake levels are higher in Japan than in western countries. Detailed analysis of food intake and its association with Na intake are necessary for supporting further decreases in Na consumption in Japan. We investigated the association between Na and food intake by food group using data from the Japanese participants of the INTERMAP Study. Method Results from the Japanese participants of the INTERMAP Study who did not use antihypertensive medication and/or consume a reduced Na diet were used (531 men and 518 women, aged 40-59 years), obtained from four 24-h dietary recalls and two 24-h urine collections from each participant. We developed a classification system with 46 food group classifications; food consumption and Na intake from these groups were compared across quartiles of participants determined by 24-h urinary Na excretion per unit of body weight (UNa/BW). Results Average daily Na intake from Japanese high-Na foods was 2552 mg/day. Participants with a higher UNa/BW consumed a significantly greater amount of high-Na Japanese foods, such as salted fish (P= 0.001) and miso soup (P < 0.001). They also had greater amount of rice (P = 0.001). Participants with lower UNa/BW consumed a significantly greater amount of western foods, such as bread (P < 0.001) and milk and dairy products (P < 0.001). Conclusions Detailed analyses of various Japanese and western food intakes in addition to Na intake were performed. These results can be used to help draw up effective programs for the reduction in Na intake and prevention of prehypertension/hypertension in the Japanese population.

Background: Lower socioeconomic status (SES) may be related to inactivity lifestyle; however, the association between SES and physical inactivity has not been sufficiently investigated in Japan. Methods: The study population is the participants of NIPPON DATA2010, which is a prospective cohort study of the National Health and Nutrition Survey 2010 in Japan. They were residents in 300 randomly selected areas across Japan. This study included 2,609 adults. Physical activity was assessed by physical activity index (PAI) calculated from activity intensity and time. The lowest tertile of PAI for each 10-year age class and sex was defined as physical inactivity. Multivariable logistic regression analyses were conducted to examine the association of SES (employment status, educational attainment, living status, and equivalent household expenditure (EHE)) with physical inactivity. Results: In the distribution of PAI by age classes and sex, the highest median PAI was aged 30-39 years among men (median 38.6), aged 40-49 years among women (38.0), and median PAI was decreased with increasing age. Multivariable-adjusted model shows that not working was significantly associated with physical inactivity after adjustment for age in all age groups and sexes. Not living with spouse for adult women and elderly men was significantly associated with physical inactivity compared to those who living with spouse. However, neither educational attainment nor EHE had any significant associations with physical inactivity. Conclusions: The result indicated that physical inactivity was associated with SES in a general Japanese population. SES of individuals need to be considered in order to prevent inactivity lifestyle.

Background/objectives: Low-carbohydrate diets (LCD) are useful for weight reduction, and 50–55% carbohydrate consumption is associated with minimal risk. Genetic differences were related to nutritional consumption, food preferences, and dietary patterns, but whether particular genetic differences in individuals influence LCD adherence is unknown. Subjects/methods: We conducted a GWAS on adherence to LCD utilizing 14,076 participants from the Japan Multi-Institutional Collaborative Cohort study. We used a previously validated semiquantitative food frequency questionnaire to estimate food consumption. Association of the imputed variants with the LCD score by Halton et al. we used linear regression analysis adjusting for sex, age, total dietary energy consumption, and components 1 to 10 by principal component analysis. We repeated the analysis with adjustment for alcohol consumption (g/day) in addition to the above-described variables. Results: Men and women combined analysis without adjustment for alcohol consumption; we found 395 variants on chromosome 12 associated with the LCD score having P values <5 × 10−8. A conditional analysis with the addition of the dosage data of rs671 on chromosome 12 as a covariate, P values for all 395 SNPs on chromosome 12 turned out to be insignificant. In the analysis with additional adjustment for alcohol consumption, we did not identify any SNPs associated with the LCD score. Conclusion: We found rs671 was inversely associated with adherence to LCD, but that was strongly confounded by alcohol consumption.

Associations between dietary fatty acid intakes and risk of coronary heart disease (CHD) are not entirely consistent in prospective studies in the U.S. and Europe. Such studies in Japan are rare. The objective of this study was to examine the association between dietary total, saturated (SFA), and polyunsaturated (PUFA) fatty acids, cholesterol intake and CHD mortality using the dataset of NIPPON DATA90. At the baseline in 1990, we performed blood biochemical measurements and a nutritional survey on participants from 300 randomly selected districts. After exclusion of participants with a history of CHD and/or stroke at the baseline, we followed 7,819 community residents (3,254 men and 4,565 women, age ≥ 30) for 15 years. We estimated individual nutrient intakes among family members by weighed food records in three consecutive representative days. During the follow-up, there were 42 CHD deaths in men and 30 in women. Mean daily SFA and PUFA % calorie intakes were 5.90±1.36%, and 5.59±1.30%, respectively in men, and 6.48±1.53%, and 6.08±1.14% in women. A Cox analysis adjusted for age, vegetable and fruit intakes, and other confounders in women found that SFA intake was significantly associated with CHD mortality (hazards ratio per one quintile increment=1.34, 95% confidence intervals: 1.02-1.74, P=0.03), while no such association was noted in men. No associations were found between other fat intakes and CHD mortality in men or women. In conclusion, SFA intake was positively associated with CHD mortality independent of confounders in women, but not in men. © 2013 Bentham Science Publishers.

Background and aims: To date, the relationship between coffee consumption and metabolic phenotypes has hardly been investigated and remains controversial. Therefore, the aim of this cross-sectional study is to examine the associations between coffee consumption and metabolic phenotypes in a Japanese population. Methods and results: We analyzed the data of 26,363 subjects (aged 35–69 years) in the baseline survey of the Japan Multi-Institutional Collaborative Cohort Study. Coffee consumption was assessed using a questionnaire. Metabolic Syndrome (MetS) was defined according to the Joint Interim Statement Criteria of 2009, using body mass index (BMI) instead of waist circumference. Subjects stratified by the presence or absence of obesity (normal weight: BMI <25 kg/m2; obesity: BMI ≥25 kg/m2) were classified by the number of MetS components (metabolically healthy: no components; metabolically unhealthy: one or more components) other than BMI. In multiple logistic regression analyses adjusted for sex, age, and other potential confounders, high coffee consumption (≥3 cups/day) was associated with a lower prevalence of MetS and metabolically unhealthy phenotypes both in normal weight (OR 0.83, 95% CI 0.76–0.90) and obese subjects (OR 0.83, 95% CI 0.69–0.99). Filtered/instant coffee consumption was inversely associated with the prevalence of MetS and metabolically unhealthy phenotypes, whereas canned/bottled/packed coffee consumption was not. Conclusion: The present results suggest that high coffee consumption, particularly filtered/instant coffee, is inversely associated with the prevalence of metabolically unhealthy phenotypes in both normal weight and obese Japanese adults.

Aim: We examined the association between dairy intake and all-cause, cancer, and cardiovascular disease mortality in a cohort of the general population followed up for 12 years across Japan. Methods: We conducted a longitudinal cohort study of 79,715 participants from the Japan Multi-Institutional Collaborative Cohort study (57.2% women, mean age 54.7 years old). The amount of dairy (milk and yogurt) intake was determined using a validated short-food frequency questionnaire. The hazard ratio for mortality according to sex-specific tertile of dairy intake was calculated using Cox proportional hazards regression models with adjustment for potential confounding factors and dietary factors by sex. Results: During the follow-up period (932,738 person-years), 3,723 participants died, including 2,088 cancer and 530 cardiovascular disease deaths. The highest tertile of total dairy intake (versus the lowest tertile) was associated with a 19% lower all-cause mortality risk (hazard ratio =0.81, 95% confidence interval: 0.70-0.92; P for trend=0.001) in women. Similarly, we observed inverse associations between milk intake and all-cause and cancer mortality risk in women, yogurt intake and cardiovascular disease risk in women, and yogurt intake and all-cause mortality risk in both sexes. Conclusion: A higher total dairy and milk intakes in women and yogurt intake in both sexes were associated with a reduced risk of all-cause mortality in the general population across Japan during the 12-year follow-up period.

Aims/Introduction: Obesity is a known risk factor for several chronic diseases, including type 2 diabetes mellitus, which results from increased insulin resistance and impaired insulin secretion. However, the association between obesity and insulin resistance in Asian populations has not yet been fully elucidated. Therefore, we aimed to investigate the causal relationship between body mass index (BMI) and glycemic traits using Mendelian randomization (MR). Materials and Methods: We performed individual-level MR analyses using genetic risk scores based on BMI-related variants in 3,745 individuals without diabetes mellitus from a Japanese cohort. We examined heterogeneity through subgroup analyses based on potential modifiers and determined the shape of the causal relationship using nonlinear MR analyses to further assess the impact of BMI on the homeostasis model assessment of insulin resistance (HOMA-IR). Results: MR analyses revealed a significant positive association between BMI and HOMA-IR (β = 0.077; 95% confidence interval, 0.014–0.141; P = 0.016; outcome variable was log-transformed and standardized). Additional analyses revealed heterogeneity among subgroups differentiated by age, sex, lifestyle habits, and cardiometabolic traits. Nonlinear MR analyses suggested a potential J-shaped causal relationship between BMI and HOMA-IR. Conclusions: Our findings demonstrated that obesity and low BMI may contribute to increased insulin resistance. Furthermore, the impact of BMI on insulin resistance could vary owing to effect modification. Managing BMI is crucial in individuals at high risk of increased insulin resistance and may have important implications for preventing type 2 diabetes, especially given the low insulin secretory capacity observed in East Asian populations.

Introduction: Intracranial subclinical vessel diseases are considered important indicators of cognitive impairment. However, a comprehensive assessment of various types of vessel disease, particularly in Asian populations, is lacking. We aimed to compare multiple types of intracranial vessel disease in association with cognitive function among a communitybased Japanese male population. Methods: The Shiga Epidemiological Study of Subclinical Atherosclerosis (SESSA) randomly recruited and examined a community-based cohort of Japanese men from Shiga, Japan. We analyzed those who underwent the Cognitive Abilities Screening Instrument (CASI) assessment and cranial magnetic resonance imaging/ angiogram (MRI/MRA) in 2010 2015. Using MRI/MRA, we assessed lacunar infarction, microbleeds, periventricular hyperintensity (PVH), deep subcortical white matter hyperintensity (DSWMH), and intracranial artery stenosis (ICAS). We divided these subclinical cerebrovascular diseases (SCDs) into three categories according to severity. Using linear regression, we calculated the CASI score according to the grade of each vessel disease, adjusted for age and years of education. Results: In the adjusted models, CASI scores were significantly associated with both PVH and DSWMH. Specifically, multivariable-adjusted CASI scores declined across increasing severity categories of DSWMH (91.7, 91.2, and 90.4; p for trend = 0.011) and PVH (91.5, 90.4, and 89.7; p for trend = 0.006). Other SCDs did not show significant associations. In stratified analyses based on the presence or absence of each SCD, both DSWMH and PVH demonstrated significant inverse trends with CASI scores in the absence of lacunar infarcts and microbleeds and in the presence of ICAS. Additionally, among participants with PVH (+), ≥moderate ICAS was significantly associated with lower CASI scores. Conclusion: PVH and DSWMH showed significant dose-response relationships with cognitive function among community-based Japanese men. These findings suggest that white matter lesions may be an important indicator of early cognitive impairment, and severe ICAS may also play a role in those with PVH.

Aim: Sedentary behavior and physical inactivity increase the risk of cardiometabolic diseases. It is important to evaluate physical activity in daily life and understand the influence of these factors on cardiometabolic diseases in the Japanese population, which tends to have a prolonged sitting time. We examined the association between sedentary behavior and physical inactivity, characterized by extended television (TV) viewing and low step counts, which are easily monitored and modifiable, and cardiometabolic risk factors in the Japanese population.Methods: This cross-sectional study included 2,531 Japanese adults (1,087 men and 1,444 women) 20–91 years old, randomly selected throughout Japan. TV viewing was assessed using a self-reported questionnaire, and step counts were measured using pedometers. Cardiometabolic risk factors were determined using physical examinations or blood samples. The association between sedentary behavior and physical inactivity with each risk factor was examined using a cross-sectional analysis with multivariate-adjusted logistic regression models.Results: In both sexes, longer TV viewing positively correlated with low high-density lipoprotein (HDL) cholesterol and high triglycerides (TG). In women, TV viewing time is associated with obesity and increased abdominal circumference (AC). Conversely, in men, lower step counts were positively associated with obesity and increased AC, low HDL cholesterol, and high TG levels.Conclusions: The association between prolonged TV viewing and cardiometabolic risk factors was more pronounced in women than in men, whereas the influence of lower step counts was stronger in men than in women. These findings contribute to the improvement of cardiovascular health by monitoring and managing individual screen times and step counts in daily life.

Background: With the increasing burden of metabolic syndrome, it is crucial to focus on lifestyle factors to reduce the risk of metabolic syndrome. Objectives: This study aims to quantify the associations between dietary diversity and the risk of metabolic syndrome among the Japanese population. Methods: This study was conducted using baseline data from the Japan Multi-Institutional Collaborative Cohort (J-MICC) study. The baseline survey was conducted from 2005 to 2014 by recruiting individuals aged 35–69. Information regarding dietary intake and biometric measurements were obtained. Dietary Diversity Score (DDS) was calculated from the data based on the food frequency questionnaire. A multiple logistic regression analysis was conducted to analyze the association between DDS and metabolic syndrome. Results: In total, 75,332 participants were included for analysis. Inverse associations were observed between a high DDS and metabolic syndrome (adjusted odds ratio, 0.83 [95% confidential interval 0.76–0.92]). Likewise, a high DDS was associated with reduced odds of a high body mass index and hypertension. No significant associations were observed between the DDS and serum triglyceride, fasting blood glucose, or high-density lipoprotein cholesterol values. Conclusion: The findings of this study emphasize that dietary diversity has inversed associations with metabolic syndrome. Promoting a diverse and balanced diet can be a potential strategy for mitigating the burden of metabolic syndrome.

Survivors of natural disasters are at a high risk of cardiovascular disease. Behavioral risk factors, including modifiable diet, need to be identified. Thus far, the association between dairy intake and new-onset hypertension among these survivors is unknown. Therefore, we investigated this relationship. We conducted a longitudinal cohort study of 4475 survivors of the Great East Japan Earthquake in 2011 who participated in a 7-year follow-up survey. New-onset hypertension was assessed using annual health checkup data. Information on the frequency of dairy intake was obtained using a self-report questionnaire. The hazard ratio for developing hypertension according to the frequency of dairy intake was calculated using Cox proportional hazards regression models. The total number of person-years observed was 20,042, with a median follow-up of 5.4 years. During the observation period, 1554 individuals developed hypertension. The multivariable-adjusted hazard ratios of new-onset hypertension were significantly lower in those who consumed dairy products once per day (0.82, 95% confidence interval 0.71–0.94) and twice or more times per day (0.84, 95% confidence interval 0.71–0.99) than in nonconsumers; the inverse linear trend was marginally significant (P = 0.083). This association was not affected by lipid metabolism and was consistent across subgroups by sex, age, behavioral factors, cardiometabolic factors, and housing type due to the disaster. A higher frequency of dairy intake was associated with a lower risk of new-onset hypertension in community-dwelling survivors of earthquakes and tsunamis. Dietary guidance involving dairy intake could reduce the risk of developing hypertension among these survivors.

BACKGROUND: Heated tobacco products (HTPs) have gained global popularity, but their health risks remain unclear. Therefore, the current study aimed to identify plasma metabolites associated with smoking and HTP use in a large Japanese population to improve health risk assessment. METHODS: Metabolomics data from 9,922 baseline participants of the Tsuruoka Metabolomics Cohort Study (TMCS) were analyzed to determine the association between smoking habits and plasma metabolites. Moreover, alterations in smoking-related metabolites among HTP users were examined based on data obtained from 3,334 participants involved from April 2018 to June 2019 in a follow-up survey. RESULTS: Our study revealed that cigarette smokers had metabolomics profiles distinct from never smokers, with 22 polar metabolites identified as candidate biomarkers for smoking. These biomarker profiles of HTP users were closer to those of cigarette smokers than those of never smokers. The concentration of glutamate was higher in cigarette smokers, and biomarkers involved in glutamate metabolism were also associated with cigarette smoking and HTP use. Network pathway analysis showed that smoking was associated with the glutamate pathway, which could lead to endothelial dysfunction and atherosclerosis of the vessels. CONCLUSION: Our study showed that the glutamate pathway is affected by habitual smoking. These changes in the glutamate pathway may partly explain the mechanism by which cigarette smoking causes cardiovascular disease. HTP use was also associated with glutamate metabolism, indicating that HTP use may contribute to the development of cardiovascular disease through mechanisms similar to those in cigarette use.

Objective: Healthy dietary patterns have been linked to lower levels of chronic inflammation. The present study aimed to investigate the associations between food group intakes and high-sensitivity C-reactive protein (hsCRP) among community-dwelling adults. Design: Cross-sectional. Setting: Three areas in Japan (Shiga, Fukuoka, or Kyushu and Okinawa). Participants: The present analysis included 13 648 participants (5126 males and 8522 females; age range, 35-69 years) who had been enrolled in the baseline survey of the Japan Multi-Institutional Collaborative Cohort Study. Food group intakes were estimated using a FFQ. Multiple linear regression was used to examine associations between the quartiles of each energy-adjusted food group intake and log-transformed hsCRP. Results: The following concentration ratios of hsCRP after comparing the highest and lowest quartiles of food group intake were significant: in males, 1.12 (95 % CI 1.02, 1.22) for processed meat, 1.13 (95 % CI 1.03, 1.24) for fish and 0.83 (95 % CI 0.76, 0.90) for nuts; in females, 0.89 (95 % CI 0.81, 0.97) for bread, 1.11 (95 % CI 1.03, 1.19) for processed meat, 0.86 (95 % CI 0.80, 0.92) for vegetables, 1.19 (95 % CI 1.11, 1.29) for fruit, 0.90 (95 % CI 0.84, 0.97) for nuts and 0.88 (95 % CI 0.82, 0.95) for green tea. Conclusions: Processed meat and nut intakes were associated with higher and lower hsCRP levels, respectively, in both sexes. However, for several food groups, including fish and fruit, previous findings from dietary pattern analyses were not supported by the present analyses at the food group level.

【目的】スポット尿から推定した24時間尿中のナトリウム(Na)・カリウム(K)排泄量と食事記録法により求められた栄養素等摂取量および食品群摂取量の関連を検討する。【方法】平成22年国民健康・栄養調査およびNIPPON DATA2010の参加者から,重篤な循環器疾患,腎臓病または腎機能低下と指摘された者および高血圧,糖尿病,脂質異常症の治療中の者を除いた男性581人,女性923人を対象とした。性別に推定24時間尿中のNaとKの排泄量の中央値で多/少を組み合わせた4群間(尿中K多Na少群,尿中K多Na多群,尿中K少Na少群,尿中K少Na多群)で栄養素等摂取量と食品群別摂取量を比較した。【結果】尿中へのK排泄量が多くNa排泄量も多い群(尿中K多Na多群)は男女ともK摂取量が尿中K少群より多く,女性においてNaおよび漬け物の摂取量が尿中Na少群より多く,野菜類摂取量が尿中K少群より多かった。尿中K少Na少群は男女ともK摂取量が尿中K多群より少なかった。尿中K少Na多群は食事中Na/K比が女性で最も高かった。尿中K多Na少群は,食事中Na/K比が女性で最も低く,男女ともK摂取量,乳類の摂取量が尿中K少群より多かった。【結論】集団レベルにおいて,スポット尿から推定した24時間尿中のNaとKの排泄量は,NaやKの摂取状況,およびKの寄与率が高い食品群の摂取量と関連している可能性が示唆された。(著者抄録)

Background: Improving diets requires an awareness of the need to limit foods for which excessive consumption is a health problem. Since there are limited reports on the link between this awareness and mortality risk, we examined the association between awareness of limiting food intake (energy, fat, and sweets) and all-cause mortality in a Japanese cohort study. Methods: Participants comprised 58,772 residents (27,294 men; 31,478 women) aged 35–69 years who completed baseline surveys of the Japan Multi-Institutional Collaborative Cohort Study from 2004 to 2014. Hazard ratios (HRs) for all-cause mortality and 95% confidence intervals (CIs) were estimated by sex using a Cox proportional hazard model, with adjustment for related factors. Mediation analysis with fat intake as a mediator was also conducted. Results: The mean follow-up period was 11 years, and 2,516 people died. Estimated energy and fat intakes according to the Food Frequency Questionnaire were lower in those with awareness of limiting food intake than in those without this awareness. Women with awareness of limiting fat intake showed a significant decrease in mortality risk (HR 0.73; 95% CI, 0.55–0.94). Mediation analysis revealed that this association was due to the direct effect of the awareness of limiting fat intake and that the total effect was not mediated by actual fat intake. Awareness of limiting energy or sweets intake was not related to mortality risk reduction. Conclusion: Awareness of limiting food intake had a limited effect on reducing all-cause mortality risk.

Aims: Nonalcoholic fatty liver disease (NAFLD) is known to be associated with atherosclerosis. This study focused on upstream changes in the process by which NAFLD leads to atherosclerosis. The study aimed to confirm the association between NAFLD and the cardio-ankle vascular index (CAVI), an indicator of subclinical atherosclerosis, and explore metabolites involved in both by assessing 94 plasma polar metabolites.Methods: A total of 928 Japanese community-dwellers (306 men and 622 women) were included in this study. The association between NAFLD and CAVI was examined using a multivariable regression model adjusted for confounders. Metabolites commonly associated with NAFLD and CAVI were investigated using linear mixed-effects models in which batch numbers of metabolite measurements were used as a random-effects variable, and false discovery rate-adjusted p-values were calculated. To determine the extent to which these metabolites mediated the association between NAFLD and CAVI, mediation analysis was conducted.Results: NAFLD was positively associated with CAVI (coefficients [95% Confidence intervals (CI)]=0.23 [0.09–0.37]; p=0.001). A total of 10 metabolites were involved in NAFLD and CAVI, namely, branched-chain amino acids (BCAAs; valine, leucine, and isoleucine), aromatic amino acids (AAAs; tyrosine and tryptophan), alanine, proline, glutamic acid, glycerophosphorylcholine, and 4-methyl-2-oxopentanoate. Mediation analysis showed that BCAAs mediated more than 20% of the total effect in the association between NAFLD and CAVI.Conclusions: NAFLD was associated with a marker of atherosclerosis, and several metabolites related to insulin resistance, including BCAAs and AAAs, could be involved in the process by which NAFLD leads to atherosclerosis.

Studies examining long-term longitudinal metabolomic data and their reliability in large-scale populations are limited. Therefore, we aimed to evaluate the reliability of repeated measurements of plasma metabolites in a prospective cohort setting and to explore intra-individual concentration changes at three time points over a 6-year period. The study participants included 2999 individuals (1317 men and 1682 women) from the Tsuruoka Metabolomics Cohort Study, who participated in all three surveys—at baseline, 3 years, and 6 years. In each survey, 94 plasma metabolites were quantified for each individual and quality control (QC) sample. The coefficients of variation of QC, intraclass correlation coefficients, and change rates of QC were calculated for each metabolite, and their reliability was classified into three categories: excellent, fair to good, and poor. Seventy-six percent (71/94) of metabolites were classified as fair to good or better. Of the 39 metabolites grouped as excellent, 29 (74%) in men and 26 (67%) in women showed significant intra-individual changes over 6 years. Overall, our study demonstrated a high degree of reliability for repeated metabolome measurements. Many highly reliable metabolites showed significant changes over the 6-year period, suggesting that repeated longitudinal metabolome measurements are useful for epidemiological studies.

The Tsuruoka Metabolomics Cohort Study (TMCS) is an ongoing population-based cohort study being conducted in the rural area of Yamagata Prefecture, Japan. This study aimed to enhance the precision prevention of multi-factorial, complex diseases, including non-communicable and aging-associated diseases, by improving risk stratification and prediction measures. At baseline, 11,002 participants aged 35–74 years were recruited in Tsuruoka City, Yamagata Prefecture, Japan, between 2012 and 2015, with an ongoing follow-up survey. Participants underwent various measurements, examinations, tests, and questionnaires on their health, lifestyle, and social factors. This study uses an integrative approach with deep molecular profiling to identify potential biomarkers linked to phenotypes that underpin disease pathophysiology and provide better mechanistic insights into social health determinants. The TMCS incorporates multi-omics data, including genetic and metabolomic analyses of 10,933 participants, and comprehensive data collection ranging from physical, psychological, behavioral, and social to biological data. The metabolome is used as a phenotypic probe because it is sensitive to changes in physiological and external conditions. The TMCS focuses on collecting outcomes for cardiovascular disease, cancer incidence and mortality, disability and functional decline due to aging and disease sequelae, and the variation in health status within the body represented by omics analysis that lies between exposure and disease. It contains several sub-studies on aging, heated tobacco products, and women’s health. This study is notable for its robust design, high participation rate (89%), and long-term repeated surveys. Moreover, it contributes to precision prevention in Japan and East Asia as a well-established multi-omics platform.

【目的】スポット尿から推定した24時間尿中のナトリウム (Na)・カリウム (K) 排泄量と食事記録法により求められた栄養素等摂取量および食品群摂取量の関連を検討する。【方法】平成22年国民健康・栄養調査およびNIPPON DATA2010の参加者から，重篤な循環器疾患，腎臓病または腎機能低下と指摘された者および高血圧，糖尿病，脂質異常症の治療中の者を除いた男性581人，女性923人を対象とした。性別に推定24時間尿中のNaとKの排泄量の中央値で多／少を組み合わせた4群間 (尿中K多Na少群，尿中K多Na多群，尿中K少Na少群，尿中K少Na多群) で栄養素等摂取量と食品群別摂取量を比較した。【結果】尿中へのK排泄量が多くNa排泄量も多い群（尿中K多Na多群）は男女ともK摂取量が尿中K少群より多く，女性においてNaおよび漬け物の摂取量が尿中Na少群より多く，野菜類摂取量が尿中K少群より多かった。尿中K少Na少群は男女ともK摂取量が尿中K多群より少なかった。尿中K少Na多群は食事中Na/K比が女性で最も高かった。尿中K多Na少群は，食事中Na/K比が女性で最も低く，男女ともK摂取量，乳類の摂取量が尿中K少群より多かった。【結論】集団レベルにおいて，スポット尿から推定した24時間尿中のNaとKの排泄量は，NaやKの摂取状況，およびKの寄与率が高い食品群の摂取量と関連している可能性が示唆された。