To evaluate the validity of food photographs used to support the reporting of food intake with an FFQ designed for adolescents from Rio de Janeiro, Brazil.

A set of ninety-five food photographs was elaborated. The photographs’ evaluation process included the acknowledgement of foods and portions in the pictures. In the identification of foods (ninety-five photographs) and typical portions (twelve photographs), the adolescents were requested to answer a structured questionnaire related to the food photographs. The identification of the portion size of amorphous foods (forty-three photographs) was performed using three different portion sizes of actual preparations. The proportions (and 95 % confidence intervals) of adolescents who correctly identified foods and portion size in each photograph were estimated.

A public school in Niterói, Rio de Janeiro State, Brazil.

Sixty-two adolescents between 11·0 and 18·9 years old, randomly selected.

At least 90 % of adolescents correctly identified the food in ninety-two photographs and the food in the three remaining photographs was recognized by 80–89 % of the adolescents. At least 98 % of the adolescents correctly identified eleven typical or natural portions in the food photographs. For amorphous foods, at least 70 % of teenagers correctly identified the portion size in the photograph of thirty-one foods; for the other photographs, the portion size was correctly recognized by 50–69 % of the adolescents for eight foods and by less than 50 % of adolescents for four foods.

The analysed photographs are appropriate visual aids to the reporting of food consumption by adolescents.

Maternal depressive symptoms negatively impact mothers’ parenting practices and children's development, but the evidence linking these symptoms to children's obesity is mixed.

We use a large sample to examine contemporaneous and lagged associations between maternal depressive symptoms and children's BMI, obesity and food consumption, controlling for background characteristics.

Data from the Early Childhood Longitudinal Study-Birth Cohort (ECLS-B), a longitudinal study of children from infancy through kindergarten in the USA, were collected at four waves from 2001 to 2007, when children were 9 months, 2 years, 4 years and 5½years of age, through surveys, child assessments and observations.

A sub-sample of children from the ECLS-B is used (n 6500).

Between 17 % and 19 % of mothers reported experiencing depressive symptoms; 17 % to 20 % of children were obese. Maternal depressive symptoms were associated with a small decrease in the likelihood her child was obese (0·8 percentage points) and with lower consumption of healthy foods. The duration of maternal depressive symptoms was associated with higher BMI (0·02 sd) among children whose parents lacked college degrees.

Results indicate that mothers’ depressive symptoms have small associations with children's food consumption and obesity. Among children whose parents lack college degrees, persistent maternal depressive symptoms are associated with slightly higher child BMI. Findings highlight the need to control for depression in analyses of children's weight. Interventions that consider maternal depression early may be useful in promoting healthy weight outcomes and eating habits among children.

The present study was designed to assess physical activity, sedentary behaviours and dietary habits among adolescents in Kuwait and to compare the differences between genders.

A cross-sectional study was conducted among secondary-school children who participated in the Arab Teens Lifestyle Study (ATLS), a multi-centre collaborative project.

Secondary schools in Kuwait.

Adolescents (463 boys and 443 girls), aged 14–19 years.

Nearly half (44·6 %) of the boys and three-quarters (76·0 %) of the girls did not meet the recommended daily physical activity levels (≥2520 MET-min/week, moderate to vigorous intensity). Nearly all (96·3 % of boys and 96·7 % of girls) adolescents reported spending >2 h/d on screen time, with girls found to spend more time per day watching television (P = 0·02) and using a computer (P < 0·001). The large majority of the adolescents reported skipping breakfast and not having milk and milk products, vegetables and fruit daily, while nearly two-thirds of the boys and girls had sugar-sweetened drinks on more than 3 d/week. Compared with girls, boys reported consuming more fruit (3·4 v. 2·8 times/week, P = 0·001), dairy products (4·5 v. 3·6 times/week, P = 0·001) and energy drinks (1·3 v. 1·1 times/week, P = 0·003).

The majority of the Kuwaiti adolescents, especially girls, do not perform adequate physical activity, spend more time on sedentary activities and have unhealthy dietary practices. The findings emphasize an urgent need for implementing an appropriate intervention for promoting physical activity, healthy eating and reducing sedentary behaviours among these children.

To assess the association of diet-related practices and BMI with diet quality in rural adults aged ≥74 years.

Cross-sectional. Dietary quality was assessed by the twenty-five-item Dietary Screening Tool (DST). Diet-related practices were self-reported. Multivariate linear regression models were used to analyse associations of DST scores with BMI and diet-related practices after controlling for gender, age, education, smoking and self- v. proxy reporting.

Geisinger Rural Aging Study (GRAS) in Pennsylvania, USA.

A total of 4009 (1722 males, 2287 females; mean age 81·5 years) participants aged ≥74 years.

Individuals with BMI < 18·5 kg/m2 had a significantly lower DST score (mean 55·8, 95 % CI 52·9, 58·7) than those individuals with BMI = 18·5–24·9 kg/m2 (mean 60·7, 95 % CI 60·1, 61·5; P = 0·001). Older adults with higher, more favourable DST scores were significantly more likely to be food sufficient, report eating breakfast, have no chewing difficulties and report no decline in intake in the previous 6 months.

The DST may identify potential targets for improving diet quality in older adults including promotion of healthy BMI, breakfast consumption, improving dentition and identifying strategies to decrease concern about food sufficiency.

To perform construct validation of the population-based Dietary Inflammatory Index (DII) using dietary data from two different dietary assessments and serum high-sensitivity C-reactive protein (hs-CRP) as the construct validator.

Using data derived from (i) three 24 h dietary recalls (24HR) at baseline and at the end of each subsequent quarter (i.e. up to fifteen over a year) and (ii) a 7 d dietary recall (7DDR) measured at baseline and then quarterly, regression analyses were conducted to test the effect of the DII score on serum hs-CRP as dichotomous (≤3 mg/l, >3 mg/l), while controlling for important potential confounders.

Existing data from the Seasonal Variation of Blood Cholesterol Study (SEASONS), a longitudinal observational study of healthy participants recruited in Worcester, MA, USA and participants were followed for 1 year.

Participants who had at least one hs-CRP measurement over her/his 1-year participation (n 495 for 24HR, n 559 for 7DDR).

Higher DII scores were associated with values of hs-CRP >3 mg/l (OR = 1·08; 95 % CI 1·01, 1·16, P = 0·035 for the 24HR; and OR = 1·10; 95 % CI 1·02, 1·19, P = 0·015 for the 7DDR).

The population-based DII was associated with interval changes in hs-CRP using both the 24HR and 7DDR. The success of this first-of-a-kind attempt at relating individuals’ intakes of inflammation-modulating foods using this refined DII, and the finding that there is virtually no drop-off in predictive capability using a structured questionnaire in comparison to the 24HR standard, sets the stage for use of the DII in a wide variety of other epidemiological and clinical studies.

To describe the contribution of mixed dishes to vegetable consumption and to estimate vegetable intake according to specific types of vegetables and other foods among US children and adolescents.

The 2003–2008 National Health and Nutrition Examination Survey (NHANES), a nationally representative probability survey conducted in the USA.

Civilian non-institutionalized US population.

All children and adolescents aged 2–18 years who met eligibility criteria (n 9169).

Approximately 59 % of total vegetable intake came from whole forms of vegetables with 41 % coming from a mixed dish. White potatoes (10·7 (se 0·6) %), fried potatoes (10·2 (se 0·4) %), potato chips (8·6 (se 0·5) %) and other vegetables (9·2 (se 0·5) %) accounted for most vegetables in their whole forms, whereas pasta dishes (9·5 (se 0·4) %), chilli/soups/stews (7·0 (se 0·5) %), pizza/calzones (7·6 (se 0·3) %) and other foods (13·7 (se 0·6) %) accounted for most mixed dishes. Usual mean vegetable intake was 1·02 cup equivalents/d; however, after excluding vegetables from mixed dishes, mean intake fell to 0·54 cup equivalents/d and to 0·32 cup equivalents/d when fried potatoes were further excluded.

Mixed dishes account for nearly half of overall vegetable intake in US children and adolescents. It is critical for future research to examine various components of vegetable intake carefully in order to inform policy and programmatic efforts aimed at improving dietary intake among children and adolescents.

To examine the types of food served at family dinner in the homes of adolescents and correlations with parent and family sociodemographic characteristics, psychosocial factors and meal-specific variables.

A cross-sectional population-based survey completed by mail or telephone by parents participating in Project F-EAT (Families and Eating and Activity in Teens) in 2009–2010.

Homes of families with adolescents in Minneapolis/St. Paul urban area, MN, USA.

Participants included 1923 parents/guardians (90·8 % female; 68·5 % from ethnic/racial minorities) of adolescents who participated in EAT 2010.

Less than a third (28 %) of parents reported serving a green salad at family dinner on a regular basis, but 70 % reported regularly serving vegetables (other than potatoes). About one-fifth (21 %) of families had fast food at family dinners two or more times per week. Variables from within the sociodemographic domain (low educational attainment) psychosocial domain (high work–life stress, depressive symptoms, low family functioning) and meal-specific domain (low value of family meals, low enjoyment of cooking, low meal planning, high food purchasing barriers and fewer hours in food preparation) were associated with lower healthfulness of foods served at family dinners, in analyses adjusted for sociodemographic characteristics.

There is a need for interventions to improve the healthfulness of food served at family meals. Interventions need to be suitable for parents with low levels of education; take parent and family psychosocial factors into account; promote more positive attitudes toward family meals; and provide skills to make it easier to plan and prepare healthful family meals.

The present study sought to investigate the associations of total n-3 fatty acid and SFA intakes with insulin resistance in a Canadian First Nation sample at risk for type 2 diabetes.

Fasting values for glucose and insulin were used to estimate insulin resistance by homeostasis model assessment (HOMA-IR). Intakes of n-3 fatty acids and SFA were computed from dietary food and drink data obtained using 3 d food records. Associations between HOMA-IR and dietary n-3 and SFA consumption were tested using linear regression models accounting for age, sex, community, education, physical activity, waist circumference, fibre, protein and carbohydrate intakes, and HDL-cholesterol and TAG concentrations.

Rural Okanagan region of British Columbia, Canada.

On-reserve First Nation individuals (Interior Salishan) aged 18 years and over, recruited for community-based diabetes screening and determined to be normoglycaemic (n 126).

HOMA-IR was negatively associated with dietary n-3 fatty acid intake (β = −0·22; 95 % CI −0·39, −0·04; P = 0·016) and positively associated with dietary SFA intake (β = 0·34; 95 % CI 0·15, 0·53; P = 0·0 0 1).

Intake of dietary n-3 fatty acids may be protective against whereas SFA intake may promote insulin resistance in this high-risk Canadian First Nation sample. Reduced dietary SFA intake and greater n-3 fatty acid intake may assist the prevention of glycaemic disease among First Nations peoples. More rigorous, controlled trials are required to test whether dietary supplementation with n-3 fatty acids in natural or supplement-based form might reduce diabetes risk in high-risk aboriginal groups.

To investigate the association between current childhood nutritional status and current wheezing among pre-school children in rural Bangladesh.

Cross-sectional study.

Matlab region, rural Bangladesh.

Children (n 912) aged 4·5 years. Anthropometric measurements of the mothers and their children were taken during a 1-year period from December 2007 to November 2008. Current wheezing was identified using the International Study of Asthma and Allergies in Childhood questionnaire. Serum total IgE was measured by human IgE quantitative ELISA. IgE specific antibody to dust mites (Dermatophagoides pteronyssinus) was measured by the CAP-FEIA system (Phadia AB, Uppsala, Sweden).

Wheezing at 4·5 years old was significantly associated with stunting (OR = 1·58; 95 % CI 1·13, 2·22) and underweight (OR = 1·39; 95 % CI 1·00, 1·94). The association with stunting remained significant after adjustment for sex, birth weight, birth length, gestational age at birth, mother's parity, maternal BMI, family history of asthma, socio-economic status, season of birth and intervention trial arm (OR = 1·74; 95 % CI 1·19, 2·56).

Stunting was a significant risk factor for wheezing among rural Bangladeshi children. Further studies will be required to confirm the relationship between nutritional status and allergic illnesses in developing countries.

Family meals have been negatively associated with overweight in children, while television (TV) viewing during meals has been associated with a poorer diet. The aim of the present study was to assess the association of eating family breakfast and dinner, and having a TV on during dinner, with overweight in nine European countries and whether these associations differed between Northern and Southern & Eastern Europe.

Cross-sectional data. Schoolchildren reported family meals and TV viewing. BMI was based on parental reports on height and weight of their children. Cut-off points for overweight by the International Obesity Task Force were used. Logistic regressions were performed adjusted by age, gender and parental education.

Schools in Northern European (Sweden, the Netherlands, Iceland, Germany and Finland) and Southern & Eastern European (Portugal, Greece, Bulgaria and Slovenia) countries, participating in the PRO GREENS project.

Children aged 10–12 years in (n 6316).

In the sample, 21 % of the children were overweight, from 35 % in Greece to 10 % in the Netherlands. Only a few associations were found between family meals and TV viewing during dinner with overweight in the nine countries. Northern European children, compared with other regions, were significantly more likely to be overweight if they had fewer family breakfasts and more often viewed TV during dinner.

The associations between family meals and TV viewing during dinner with overweight were few and showed significance only in Northern Europe. Differences in foods consumed during family meals and in health-related lifestyles between Northern and Southern & Eastern Europe may explain these discrepancies.

To examine (i) whether the consumption of fresh vegetables, fruit and berries is associated with plasma vitamin C concentration and (ii) educational differences in plasma vitamin C concentration in two neighbouring areas in Russia and Finland.

Cross-sectional risk factor surveys in 1992, 1997 and 2002. Logistic regression analysis was applied to examine the associations of consumption of selected foods and education with plasma vitamin C concentration.

District of Pitkäranta in the Republic of Karelia, Russia and North Karelia, Finland.

Adults aged 25–64 years: 579 men and 612 women in Pitkäranta; 974 men and 642 women in North Karelia.

The plasma vitamin C concentration was strikingly low in Pitkäranta, Russia across the study years. During the 10 years of monitoring, the mean plasma vitamin C concentration among men ranged from 2·5 to 8·0 μmol/l in Pitkäranta, Russia and from 27·1 to 53·9 μmol/l in North Karelia, Finland. In both areas, daily consumption of fruit was most strongly associated with plasma vitamin C, while the association of fresh vegetable consumption with plasma vitamin C was less consistent. Consumption of berries was less important in explaining plasma vitamin C. In Pitkäranta, the plasma vitamin C concentration was lower among respondents in the lowest education group.

Differences in the consumption of fresh vegetables and fruit resulted in notable differences in vitamin C status between Pitkäranta and North Karelia in spring. In comparative settings, knowledge of local food culture and validation pilots are important before conducting large population surveys.

To update previous meta-analyses of cohort studies that investigated the association between the Mediterranean diet and health status and to utilize data coming from all of the cohort studies for proposing a literature-based adherence score to the Mediterranean diet.

We conducted a comprehensive literature search through all electronic databases up to June 2013.

Cohort prospective studies investigating adherence to the Mediterranean diet and health outcomes. Cut-off values of food groups used to compute the adherence score were obtained.

The updated search was performed in an overall population of 4 172 412 subjects, with eighteen recent studies that were not present in the previous meta-analyses.

A 2-point increase in adherence score to the Mediterranean diet was reported to determine an 8 % reduction of overall mortality (relative risk = 0·92; 95 % CI 0·91, 0·93), a 10 % reduced risk of CVD (relative risk = 0·90; 95 % CI 0·87, 0·92) and a 4 % reduction of neoplastic disease (relative risk = 0·96; 95 % CI 0·95, 0·97). We utilized data coming from all cohort studies available in the literature for proposing a literature-based adherence score. Such a score ranges from 0 (minimal adherence) to 18 (maximal adherence) points and includes three different categories of consumption for each food group composing the Mediterranean diet.

The Mediterranean diet was found to be a healthy dietary pattern in terms of morbidity and mortality. By using data from the cohort studies we proposed a literature-based adherence score that can represent an easy tool for the estimation of adherence to the Mediterranean diet also at the individual level.

The aim of the present study was to examine the association between nutritional status and the incidence of disability regarding instrumental activities of daily living (IADL) among older adults.

The study is part of the longitudinal SABE (Saúde, Bem-Estar e Envelhecimento; Health, Wellbeing and Ageing) Study that began in 2000 (first wave) with a multistage, clustered, probabilistic sample (n 2143) of older adults (≥60 years). The second wave was carried out in 2006, when 1115 elders were re-interviewed. The dependent variable was the occurrence of disability in 2006 (report of difficulty on ≥1 IADL). Nutritional status (measured at baseline) was classified on the basis of BMI: ≤23·0 kg/m2 (underweight); >23·0 and <28·0 kg/m2 (ideal range – reference); ≥28·0 and <30·0 kg/m2 (overweight); and ≥30·0 kg/m2 (obesity).

São Paulo, Brazil.

One thousand and thirty-four individuals without difficulties regarding IADL in 2000 were selected, 611 of whom were re-interviewed in 2006.

In the multiple logistic regression analysis adjusted for baseline variables (gender, age, number of chronic diseases, stroke, osteoarthritis and cognitive status), underweight (OR = 2·03; P = 0·034) and obesity (OR = 1·79; P = 0·022) remained associated with disability.

Both underweight and obesity are associated with an increased risk of developing disability regarding IADL among older adults, in an independent fashion of other risk factors. Thus, adequate nutritional status is a key point to consider in the establishment of preventive measures.

To measure BMR in a probability sample of adults from an urban city of Brazil and to compare indirectly measured BMR (BMRi) with BMR predicted from different equations.

BMR data were obtained by indirect calorimetry and estimated by different predictive equations (Schofield; Harris and Benedict; Henry and Rees). Anthropometric and body composition measures were also obtained.

The Nutrition, Physical Activity and Health Survey (PNAFS), a household survey conducted in Niterói, Rio de Janeiro state, Brazil.

Representative sample of 529 adults (aged ≥20 years; 339 females) living in Niterói, Rio de Janeiro state, Brazil.

Mean BMRi values were 5839·7 (se 73·9) kJ/d and 4758·1 (se 39·5) kJ/d for men and women, respectively. Predicted BMR by all equations was significantly higher (difference between means and 95 % CI did not include zero) than BMRi in both men and women of all ages. Overall bias in BMR (predicted BMR minus BMRi) using the Schofield equations (overestimation of about 20 %) was higher than when using the Henry and Rees equations (13 % and 16 % overestimation for males and females, respectively). The percentage of individuals whose BMR predicted by the Schofield equations fell within 10 % of BMRi was very low (7·8 % and 14·1 % of males and females, respectively).

Current available predictive equations of BMR are not adequate to estimate BMR in Brazilians living in Niterói, Rio de Janeiro, Brazil.

There are few data on the dietary intake of children in Libya, and none on free sugars intake. The present study aimed to report the intake of macronutrients and eating habits of relevance to dental health in a group of Libyan schoolchildren and to investigate any gender differences for these variables.

Dietary information was obtained from a randomly selected sample using an estimated 3 d food diary. Dietary data were coded using food composition tables and entered into a Microsoft® Access database. Intakes of energy, macronutrients, sugars and the amount of acidic items consumed were determined using purpose-written programs.

Benghazi, Libya.

Schoolchildren aged 12 years.

One hundred and eighty children (ninety-two boys and eighty-eight girls) completed the study. Their mean age was 12·3 (sd 0·29) years. The average daily energy intake was 7·01 (sd 1·54) MJ/d. The percentage contributions to energy intake from protein, fat and carbohydrate were 16 %, 30 % and 54 %, respectively. Total sugars contributed 20·4 % of the daily energy intake, and free sugars 12·6 %. The median daily intake of acidic items was 203 g/d, and of acidic drinks was 146 g/d. There were no statistically significant differences in nutrient intakes between genders. Intake of acidic items was higher in girls (P < 0·001).

The contribution to energy intake from macronutrients was in accordance with global nutrition guidelines. The acidic drinks intake was low compared with other populations, while free sugars intake was above the recommended threshold of 10 % of energy intake.

To evaluate a primary prevention care model using telephone support delivered through an existing health call centre to general practitioner-referred patients at risk of developing CVD, using objective measures of CVD risk reduction and weight loss.

Participants were randomised into two groups: (i) those receiving a telephone-supported comprehensive lifestyle intervention programme (CLIP: written structured diet and exercise advice, plus seven telephone sessions with the Heart Foundation Health Information Service); and (ii) those receiving usual care from their general practitioner (control: written general lifestyle advice). Fasting plasma lipids, blood pressure, weight, waist circumference and height were assessed on general practice premises by a practice nurse at Weeks 0 and 12.

Two general practices in Adelaide, South Australia.

Forty-nine men and women aged 48·0 (sd 5·88) years identified by their general practitioner as being at future risk of CVD (BMI = 33·13 (sd 5·39) kg/m2; LDL cholesterol (LDL-C) = 2·66 (sd 0·92) mmol/l).

CLIP participants demonstrated significantly greater reductions in LDL-C (estimated mean (EM) = 1·98 (se 0·17) mmol/l) and total cholesterol (EM = 3·61 (se 0·21) mmol/l) at Week 12 when compared with the control group (EM = 3·23 (se 0·18) mmol/l and EM = 4·77 (se 0·22) mmol/l, respectively). There were no significant treatment effects for systolic blood pressure (F(1,45) = 0·28, P = 0·60), diastolic blood pressure (F(1,43) = 0·52, P = 0·47), weight (F(1,42) = 3·63, P = 0·063) or waist circumference (F(1,43) = 0·32, P = 0·577).

In general practice patients, delivering CLIP through an existing telephone health service is effective in achieving reductions in LDL-C and total cholesterol. While CLIP may have potential for wider implementation to support primary prevention of CVD, longer-term cost-effectiveness data are warranted.

To analyse the factors associated with the level of adherence to a Mediterranean dietary pattern in healthy Spanish women before pregnancy.

A prospective series of 1175 women. An FFQ validated in Spanish populations served to collect dietary data. The Mediterranean Diet Adherence Index was used to assess the level of adherence to a Mediterranean diet pattern. Polytomic regression was performed to identify the associated factors.

Catchment area of Virgen de las Nieves University Hospital, Andalusia, Spain.

The women were invited to participate in the study at the 20th–22nd gestational week. The selection criteria were: Spanish nationality, 18 years of age or older, singleton pregnancy and absence of health problems that required modifying the diet or physical activity.

An inverse relationship was found between women's age and level of adherence to a Mediterranean diet pattern, with a clear dose–response association: a younger age entailed worse adherence (P < 0·001). The habit of smoking and sedentary lifestyle had a positive relationship with low adherence, giving OR = 5·36 (95 % 1·91, 15·07) for women who smoked >20 cigarettes/d and OR = 2·07 (95 % CI 1·34, 3·17) for sedentary women. Higher age, higher educational level, and higher social class of the women were associated with a higher level of adherence to the Mediterranean diet (P < 0·001).

In our sample population, younger age, lower social class, primary educational level and elements of an unhealthy lifestyle such as smoking and lack of exercise were associated with low adherence to a Mediterranean diet.

Studies on the effects of Ramadan fasting on weight changes have been contradictory. We brought together all published data to comprehensively examine the effects in a systematic review and meta-analysis.

Relevant studies were obtained through searches of PubMed and CINAHL and by independent screening of reference lists and citations without any time restriction. All searches were completed between October and November 2011.

Changes in body weight during and after Ramadan were extracted from thirty-five English-language studies and were meta-analysed. Most of the studies were conducted in West Asia (n 19); the remainder were conducted in Africa (n 7), East Asia (n 3) and North America/Europe (n 4).

Healthy adults.

Fasting during Ramadan resulted in significant weight loss (−1·24 kg; 95 % CI −1·60, −0·88 kg). However, most of the weight lost was regained within a few weeks and only a slight decrease in body weight was observed in the following weeks after Ramadan compared with that at the beginning of Ramadan. Weight loss at the end of Ramadan was significant in both genders (−1·51 kg for men and −0·92 kg for women); but again the weight loss lasted no longer than 2 weeks after Ramadan. Weight loss during Ramadan was greater among Asian populations compared with Africans and Europeans.

Weight changes during Ramadan were relatively small and mostly reversed after Ramadan, gradually returning to pre-Ramadan status. Ramadan provides an opportunity to lose weight, but structured and consistent lifestyle modifications are necessary to achieve lasting weight loss.

Se is an antioxidant micronutrient and has been studied for its potential role in CVD prevention. The purpose of the present study was to conduct a systematic review of the literature on the relationship between Se and hypertension.

We conducted a systematic literature search in PubMed and OVID of studies on Se levels and hypertension or blood pressure published in English up to June 2011. Articles meeting inclusion criteria were reviewed and the following information was gathered from each publication: study setting, participant demographics, exclusion criteria, intervention if applicable, medium of Se measure, mean level of Se, outcome definition, relationship between Se and the outcome variable, significance of this relationship, and covariates. In studies that also reported glutathione peroxidase levels, we extracted results on the relationship between glutathione peroxidase and hypertension.

Twenty-five articles were included. Approximately half of the studies reported no significant relationship between Se and hypertension. Of the remaining studies, about half found that higher Se levels were associated with lower blood pressure and the other half found the opposite relationship. The studies varied greatly in terms of study population, study design and Se levels measured in participants.

Based on the present systematic review, there is no conclusive evidence supporting an association between Se and hypertension. Randomized controlled trials and prospective studies with sufficient sample size in populations with different Se levels are needed to fully investigate the relationship between Se and hypertension.

To evaluate the association of sociodemographic factors and parental food consumption with children's food intake.

A cross-sectional survey.

A population-based study with a representative sample in a metropolitan region of Rio de Janeiro, Brazil. Parents’ socio-economic variables, age and education level and children's age were obtained by face-to-face interviews. The parental food intake was assessed using an FFQ and the children's food intake was assessed using two 24 h recalls.

Children (n 366) aged 6–30 months and their parents.

The hierarchical regression analysis indicated that parents’ age was positively associated with the intake of vegetables among children (β = 0·73, 95 % CI 0·11, 1·34), while parents’ educational level was positively associated with the intake of fats (β = 3·52, 95 % CI 0·04, 7·01) and negatively associated with the intake of beans (β = −13·98, 95 % CI −27·94, −0·03). The age of the children was positively associated with the intakes of meats and eggs (β = 2·88, 95 % CI 1·55, 4·22), sugars (β = 5·08, 95 % CI 1·85, 8·30) and coffee (β = 1·77, 95 % CI 0·71, 2·84), and negatively associated with the intake of vegetables (β = −2·12, 95 % CI −3·20, −1·05). The influence of parental food intake was observed for the food groups of breads, cereals and tubers (β = 0·06, 95 % CI 0·003, 0·12), beans (β = 0·11, 95 % CI −0·003, 0·22) and fruits (β = 0·10, 95 % CI 0·03, 0·16). Unfavourable socio-economic variables were associated with intakes of breads, cereals and tubers, vegetables, fruits, meats, sugars and coffee by children.

Parental food intake is associated with children's intake of cereals, beans and fruits independent of socio-economic status.