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BACKGROUND: Plant-based diets are associated with a lower risk of cardiovascular diseases; however, little is known how the healthiness of the diet may be associated with blood pressure (BP). We aimed to modify three plant -based diet indices: overall plant-based diet index (PDI), healthy PDI (hPDI), and unhealthy PDI (uPDI) according to country-specific dietary guidelines to enable use across populations with diverse dietary patterns - and assessed their associations with BP. DESIGN: We used cross-sectional data including 4,680 men and women ages 40-59y in Japan, China, the United Kingdom, and the United States from the INTERnational study on MAcro/micronutrients and blood Pressure (INTERMAP). During four visits, eight BP measurements, and four 24-h dietary recalls were collected. Multivariable regression coefficients were estimated, pooled, weighted, and adjusted extensively for lifestyle/dietary confounders. RESULTS: Modified PDI was not associated with BP. Consumption of hPDI higher by 1SD was inversely associated with systolic (-0.82 mm Hg;95% CI:-1.32,-0.49) and diastolic BP (-0.49 mm Hg; 95% CI:-0.91, -0.28). In contrast, consumption of an uPDI was directly associated with systolic (0.77 mm Hg;95% CI:0.30,1.20). Significant associations between hPDI with BP were attenuated with separate adjustment for vegetables and whole grains; associations between uPDI and BP were attenuated after adjustment for refined grains, sugar-sweetened beverages, and meat. CONCLUSION: An hPDI is associated with lower BP while a uPDI is adversely related to BP. Plant-based diets rich in vegetables and whole grains and limited in refined grains, sugar-sweetened beverages, and total meat may contribute to these associations. In addition to current guidelines, the nutritional quality of consumed plant foods is as important as limiting animal-based components. TRIAL REGISTRATION NUMBER: The observational INTERMAP study was registered at www.clinicaltrials.gov as NCT00005271.

Metabolism is altered by genetics, diet, disease status, environment, and many other factors. Modeling either one of these is often done without considering the effects of the other covariates. Attributing differences in metabolic profile to one of these factors needs to be done while controlling for the metabolic influence of the rest. We describe here a data analysis framework and novel confounder-adjustment algorithm for multivariate analysis of metabolic profiling data. Using simulated data, we show that similar numbers of true associations and significantly less false positives are found compared to other commonly used methods. Covariate-adjusted projections to latent structures (CA-PLS) are exemplified here using a large-scale metabolic phenotyping study of two Chinese populations at different risks for cardiovascular disease. Using CA-PLS, we find that some previously reported differences are actually associated with external factors and discover a number of previously unreported biomarkers linked to different metabolic pathways. CA-PLS can be applied to any multivariate data where confounding may be an issue and the confounder-adjustment procedure is translatable to other multivariate regression techniques.

BackgroundFavorable levels of all readily measurable major cardiovascular disease risk factors (ie, low risk [LR]) are associated with lower risks of cardiovascular disease morbidity and mortality. Data are not available on LR prevalence among Hispanic/Latino adults of diverse ethnic backgrounds. This study aimed to describe the prevalence of a low cardiovascular disease risk profile among Hispanic/Latino adults in the United States and to examine cross-sectional associations of LR with measures of acculturation.Methods and resultsThe multicenter, prospective, population-based Hispanic Community Health Study/Study of Latinos examined 16415 men and women aged 18 to 74years at baseline (2008-2011) with diverse Hispanic/Latino backgrounds. Analyses involved 14757 adults (mean age 41.3years; 60.6% women). LR was defined using national guidelines for favorable levels of serum cholesterol, blood pressure, and body mass index and by not having diabetes mellitus and not currently smoking. Age-adjusted LR prevalence was low (8.4% overall; 5.1% for men, 11.2% for women) and varied by background (4.2% in men of Mexican heritage versus 15.0% in women of Cuban heritage). Lower acculturation (assessed using proxy measures) was significantly associated with higher odds of a LR profile among women only: Age-adjusted odds ratios of having LR were 1.64 (95% CI 1.24-2.17) for foreign-born versus US-born women and 1.96 (95% CI 1.49-2.58) for women residing in the United States

BackgroundA nutrient-wide approach may be useful to comprehensively test and validate associations between nutrients (derived from foods and supplements) and blood pressure (BP) in an unbiased manner.Methods and resultsData from 4680 participants aged 40 to 59 years in the cross-sectional International Study of Macro/Micronutrients and Blood Pressure (INTERMAP) were stratified randomly into training and testing sets. US National Health and Nutrition Examination Survey (NHANES) four cross-sectional cohorts (1999-2000, 2001-2002, 2003-2004, 2005-2006) were used for external validation. We performed multiple linear regression analyses associating each of 82 nutrients and 3 urine electrolytes with systolic and diastolic BP in the INTERMAP training set. Significant findings were validated in the INTERMAP testing set and further in the NHANES cohorts (false discovery rate

to describe eating behaviours of the Italian adult population collected by the Osservatorio Epidemiologico Cardiovascolare/Health Examination Survey during 2008- 2012.cross-sectional survey conducted in all Italian regions; random samples of the general population, stratified by age and sex, in 23 municipalities, 220 persons every 1.5 million people.9,111 persons examined, aged 25-79 years; participation rate of 53%; data of 8,462 persons were used in this analysis.lifestyles, risk factors, and high risk conditions were measured. Eating behaviours were assessed by the EPIC questionnaire, which includes principal foods, portions, and eating patterns; principal health eating behaviours and nutrients were described by macroareas; sodium and potassium intake were measured also by 24h urine collection; data were compared to the Mediterranean model described in the Sixties nutritional survey carried out in Nicotera, a municipality of Calabria Region, Southern Italy.the eating behaviours are healthy only in a part of the population: 30% have adequate intake of vegetables and fish; only 10% use cakes/sweets/desserts once a week as recommended. Energy intake from saturated fat and sugars are high. Compared to the Sixties Mediterranean model, consumption of cereals, potatoes, and legumes are reduced by half, while meats, cheeses, milk, and in particular sweets are more than doubled.taking into account the distribution of risk factors and high risk conditions as overweight/obesity, which affects almost 75% of the adult population, physical inactivity (30-40%), hypertension (50%), hypercholesterolemia (35%), and diabetes (7-11%), community actions for improving diet in the population are urgent. Education of the population is also needed to reduce portions and salt intake, and to use less olive oil and wine given their high caloric values, as recommended by the modern Mediterranean diet.