This study examined the association between predominant vegetable oil consumed and BMI of adult women and men in India, with emphasis on predominant consumption of mustard oil.

Two nationally representative data, the consumer expenditure survey of National Sample Survey Office (NSSO)-68th round (2011–2012) for food consumption and National Family Health Survey-4 (2015–2016) for weight status, were analysed. Data from both surveys were combined by matching households through common matching variables (‘family size’, ‘religion’, etc.) using Nearest-Neighbour Hot-Deck matching. The association of overweight/obesity with predominant mustard oil consumption in the household was examined using logistic regression adjusted for confounders. The NSSO reports household consumption of mustard, groundnut, coconut, refined oils (sunflower, safflower, soyabean) and all other edible oils.

Two nationally representative surveys from India.

Total of 638 445 women and 92 312 men, respectively.

Mustard oil was the most predominantly consumed oil (51 %) followed by refined oils (32·4 %). Prevalence of overweight/obesity in women and men was lower in households with predominant mustard oil consumption (17 and 15 %) v. all other refined and other oils combined (27 and 26 %). The adjusted OR for predominant mustard oil use was 0·88 (95 % CI 0·86, 0·87) for women and 0·80 (95 % CI 0·76, 0·83) for men. A similar analysis with predominant groundnut oil consumption showed no association with overweight/obesity.

The data from a large national level survey suggest an inverse association between mustard oil consumption and overweight/obesity which needs to be explored with further research studies.

In 2012, the US government overhauled school nutrition standards, but few studies have evaluated the effects of these standards at the national level. The current study examines the impact of the updated school nutrition standards on dietary and health outcomes of schoolchildren in a nationally representative data set.

Difference-in-differences. We compared weekday fruit and vegetable intake between students with daily school lunch participation and students without school lunch participation before and after implementation of updated school nutrition standards using a multivariable linear regression model. Secondary outcomes included weekday solid fat and added sugar (SoFAS) intake and overweight and obesity prevalence. We adjusted analyses for demographic and family socio-economic factors.

USA.

K-12 students, aged 6–20 years (n 9172), from the National Health and Nutrition Examination Survey, 2005–2016.

Implementation of updated school nutrition standards was not associated with a change in weekday fruit and vegetable intake (β = 0·02 cups, 95 % CI −0·23, 0·26) for students with daily school lunch participation. However, implementation of the policy was associated with a 1·5 percentage point (95 % CI −3·0, −0·1) decline in weekday SoFAS intake and a 6·1 percentage point (95 % CI −12·1, −0·1) decline in overweight and obesity prevalence.

Changes to US school nutrition standards were associated with reductions in the consumption of SoFAS as well as a decrease in overweight and obesity in children who eat school lunch. However, we did not detect a change in weekday intake of fruits and vegetables associated with the policy change.

To estimate the prevalence of overweight and obesity among children and adolescents in north Jordan and to evaluate the dietary knowledge of their mothers.

Cross-sectional study.

Schools, Irbid, Jordan.

Male and female participants (n 516) aged 6–18 years.

Thirty per cent of our sample population was overweight or obese, and about 11 % was underweight. Males tend to have a higher BMI and waist circumference than females except in the age group ≥15 years. Children who ate in front of the television tended to have higher BMI and waist circumference. Forty per cent of the mothers answered four or more questions correctly out of six, which indicated a sufficient level of nutritional knowledge.

The study revealed that obesity is a growing health problem in children and adolescents in north Jordan. This finding is considered a serious concern for public health and calls for the creation of new prevention programmes at the individual, family and community level.

The aim of the current meta-analysis was to evaluate the accuracy of using BMI based on self-reported height and weight (BMIsr) to estimate the prevalence of overweight and obesity among children and adolescents.

A systematic literature search was conducted to select studies that compared the prevalence rates of overweight and obesity based on BMIsr and BMIm (BMI based on measured height and weight). A random-effect model was assumed to estimate summary prevalence rates and prevalence ratio (PR).

Thirty-seven studies were included. The aggregated prevalence of overweight and obesity based on BMIsr (0·190, 95 % CI 0·163, 0·221) was significantly lower than that based on BMIm (0·233, 95 % CI 0·203, 0·265). The pooled mean PR was 0·823 (95 % CI 0·775, 0·875). Moderator analyses showed that the underestimation was related to gender, age, weight status screened (overweight v. obesity) and weight status screening tool.

BMIsr may produce less biased results under some conditions than others. Future researchers using BMIsr may consider these findings and avoid the conditions that could lead to more severe underestimation of the prevalence of overweight and obesity among children and adolescents.

To identify predominant dietary patterns in four African populations and examine their association with obesity.

Cross-sectional study.

We used data from the Africa/Harvard School of Public Health Partnership for Cohort Research and Training (PaCT) pilot study established to investigate the feasibility of a multi-country longitudinal study of non-communicable chronic disease in sub-Saharan Africa. We applied principal component analysis to dietary intake data collected from an FFQ developed for PaCT to ascertain dietary patterns in Tanzania, South Africa, and peri-urban and rural Uganda. The sample consisted of 444 women and 294 men.

We identified two dietary patterns: the Mixed Diet pattern characterized by high intakes of unprocessed foods such as vegetables and fresh fish, but also cold cuts and refined grains; and the Processed Diet pattern characterized by high intakes of salad dressing, cold cuts and sweets. Women in the highest tertile of the Processed Diet pattern score were 3·00 times more likely to be overweight (95 % CI 1·66, 5·45; prevalence=74 %) and 4·24 times more likely to be obese (95 % CI 2·23, 8·05; prevalence=44 %) than women in this pattern’s lowest tertile (both P<0·0001; prevalence=47 and 14 %, respectively). We found similarly strong associations in men. There was no association between the Mixed Diet pattern and overweight or obesity.

We identified two major dietary patterns in several African populations, a Mixed Diet pattern and a Processed Diet pattern. The Processed Diet pattern was associated with obesity.

Immigrants in the USA are confronted with health disparities, including childhood obesity and obesity-related chronic diseases. We aimed to identify perceptions of childhood body weight, approaches to raising healthy children and desires for supportive programmes of Somali, Latino and Hmong (SLM) parents in the Twin Cities, Minnesota, USA.

Using community-based participatory research, ten focus groups (FG) were conducted with sixty-seven parents (n 28 Somali, three FG; n 19 Latino, four FG; n 20 Hmong, three FG) of 3–12-year-old children in their native language. Demographic information was collected.

SLM parents perceived that health is not necessarily weight-based; childhood obesity is caused by overeating, eating unhealthy foods and sedentary activities; traditional foods are generally healthy while American foods are generally unhealthy; and healthy children are inherently physically active. Parents identified their goals as feeding children so they would be healthy and happy, helping them be active and safe, and teaching them to cook traditional foods to be self-sufficient and maintain their cultural identity. Parents were challenged by children’s unhealthy food and sedentary preferences, their own uncertainties about healthy foods and behaviours, and structural factors. Parents thought interventions could help them with these challenges, including information about healthy foods, age-appropriate portion sizes, safe places to be active and strategies tailored to their cultural norms.

SLM parents are trying to raise healthy-weight children based on their understanding of children’s health, weight, diet and physical activity, while dealing with social, economic and environmental challenges and trying to maintain cultural identity and traditions.

The present study determined trends in malnutrition among under-5 children in urban and rural areas of Bangladesh.

Surveillance.

The study was conducted in the urban Dhaka and the rural Matlab hospitals of the International Centre for Diarrhoeal Disease Research, Bangladesh, where every fiftieth patient and all patients coming from the Health and Demographic Surveillance System were enrolled.

A total of 28 816 under-5 children were enrolled at Dhaka from 1993 to 2012 and 11 533 at Matlab between 2000 and 2012.

In Dhaka, 46 % of the children were underweight, 39 % were stunted and 28 % were wasted. In Matlab, the corresponding figures were 39 %, 31 % and 26 %, respectively. At Dhaka, 0·5 % of the children were overweight and obese when assessed by weight-for-age Z-score >+2·00, 1·4 % by BMI-for-age Z-score >+2·00 and 1·4 % by weight-for-height Z-score >+2·00; in Matlab the corresponding figures were 0·5 %, 1·4 % and 1·4 %, respectively. In Dhaka, the proportion of underweight, stunting and wasting decreased from 59 % to 28 % (a 53 % reduction), from 54 % to 22 % (59 % reduction) and from 33 % to 21 % (36 % reduction), respectively, between 1993 and 2012. In Matlab, these indicators decreased from 51 % to 27 % (a 47 % reduction), from 36 % to 25 % (31 % reduction) and from 34 % to 14 % (59 % reduction), respectively, from 2000 to 2012. On the other hand, the proportion of overweight (as assessed by BMI-for-age Z-score) increased significantly over the study period in both Dhaka (from 0·6 % to 2·6 %) and Matlab (from 0·8 % to 2·2 %).

The proportion of malnourished under-5 children has decreased gradually in both urban and rural Bangladesh; however, the reduction rates are not in line with meeting Millennium Development Goal 1. Trends for increasing childhood obesity have been noted during the study period as well.

To report on the prevalence of overweight and obesity among pre-school children in Kenya and examine the associations between childhood overweight and selected maternal and child-related factors.

Demographic Health Survey data, multistage stratified cluster sampling methodology.

Rural and urban areas of Kenya.

A total of 1495 children between the ages of 3 and 5 years in Kenya.

Over 30 % of the children were stunted, approximately 16 % were underweight, 4 % were wasted, approximately 18 % were overweight and 4 % were obese; 8 % were both overweight/obese and stunted. Maternal overweight and obesity, higher levels of maternal education, being a large or very large child at birth, and being stunted were each associated with higher odds of overweight and obesity among Kenyan children. Older children and large household size were each associated with lower odds of overweight and obesity among Kenyan children.

The analysis demonstrates the presence of under- and overnutrition among Kenyan pre-school children and the importance of focusing on expanding efforts to prevent and treat malnutrition within this population. It also identifies some of the modifiable factors that can be targeted in these efforts.

To describe the meal patterns of Jena schoolchildren and their associations with children’s weight status and parental characteristics.

Cross-sectional study.

Twenty schools in Jena (∼100 000 inhabitants), south-east Germany.

A total of 2054 schoolchildren aged 7–14 years with information on BMI standard deviation score (BMI-SDS) and weight status (based on German reference values), of whom 1571 had additional information about their parents (parental education and employment status, weight status according to WHO guidelines) and meal patterns (school lunch participation rate, meal frequencies, breakfast consumption and frequency of family meals).

Weight status of the children was associated with weight status, education and employment status of the parents. Meal patterns were strongly dependent on children’s age and parental employment. As age increased, the frequency of meal consumption, participation rate in school lunches and the number of family meals decreased. Using linear regression analysis, a high inverse association between BMI-SDS and meal frequency was observed, in addition to relationships with parental weight status and paternal education.

Age-specific prevention programmes should encourage greater meal frequency. The close involvement of parents is essential in any strategy for improving children’s (families’) diets.