Lower Risk Of Overweight Research Articles

Overweight in adult cats: a cross-sectional study

BackgroundOverweight in cats is a major risk factor for diabetes mellitus and has also been associated with other disorders. Overweight and obesity are believed to be increasing problems in cats, as is currently seen in people, with important health consequences. The objectives of the present study were to determine the prevalence of overweight in cats from two different cohorts in a cross-sectional study design and to assess associations between overweight and diagnoses, and between overweight and demographic and environmental factors. Data were obtained from medical records for cats (n = 1072) visiting an academic medical center during 2013–2015, and from a questionnaire on insured cats (n = 1665). From the medical records, information on body condition score, breed, age, sex, neutering status, and diagnosis was obtained. The questionnaire included questions relating to the cat’s body condition, breed, age, sex, neutering status, outdoor access, activity level, and diet. Data were analyzed by multivariable logistic regression.ResultsThe prevalence of overweight was 45% in the medical records cohort and 22% in the questionnaire cohort, where owners judged their pet’s body condition. Overweight cats in the medical records cohort were more likely to be diagnosed with lower urinary tract disease, diabetes mellitus, respiratory disease, skin disorders, locomotor disease, and trauma. Eating predominantly dry food, being a greedy eater, and inactivity were factors associated with an increased risk of overweight in the final model in the questionnaire cohort. In both cohorts, the Birman and Persian breeds, and geriatric cats, were less likely to be overweight, and male cats were more likely to be overweight.ConclusionsThe prevalence of overweight cats (45%) as assessed by trained personnel was high and in the same range as previously reported. Birman and Persian cats had a lower risk of overweight. The association with dry food found in adult, neutered cats is potentially important because this type of food is commonly fed to cats worldwide, and warrants further attention. Drawbacks related to the study design need to be acknowledged when interpreting the results, such as a potential for selection bias for cats visiting an animal hospital, and an information bias for questionnaire data. The high occurrence of overweight in cats needs to be addressed because it negatively affects their health.

The effect of an online video intervention \u2018Movie Models\u2019 on specific parenting practices and parental self-efficacy related to children\u2019s physical activity, screen-time and healthy diet: a quasi experimental study

BackgroundIn children, being sufficiently physically active, having low levels of screen-time and having a healthy diet are largely influenced by parenting practices. Children of parents applying positive parenting practices are at lower risk for overweight and obesity. Therefore, we investigated the effect of a health promoting online video intervention for parents (‘Movie Models’) on children’s physical activity (PA), screen-time and healthy diet, and on specific parenting practices and parental self-efficacy related to these parenting practices. The online videos are delivered to parents of primary schoolchildren, and were based on real-life scenarios.MethodsA two-armed, quasi experimental design was used. Parents of primary schoolchildren were recruited between November and December 2013 by spreading an appeal in social media, and by contacting primary schools. Participating parents were predominantly of high socio-economic status (SES) (83.1%), and only 6.8% of children were overweight/obese. Intervention group participants were invited to watch online videos for 4 weeks. Specific parenting practices, parental self-efficacy, PA, screen-time and healthy diet of the child were assessed at baseline (T0), at one (T1) and at four (T2) months post baseline. Repeated Measures (Multivariate) ANOVAs were used to examine intervention effects. The potential moderating effect of age and gender of the child and parental SES was also examined.ResultsBetween T0 and T2, no significant intervention effects were found on children’s PA, screen-time or healthy diet. Most significant intervention effects were found for more complex parenting practices (e.g., an increase in motivating the child to eat fruit). Subgroup analyses showed that the intervention had more effect on the actual parenting practices related to PA, screen-time and healthy diet in parents of older children (10–12 years old), whereas intervention effects on parental self-efficacy related to those behaviors were stronger in parents of younger children (6–9 years old).Conclusions‘Movie Models’ was effective in increasing some important parenting practices and parental self-efficacy related to PA, screen-time and healthy diet in children. Therefore, the current study is an important first step in promoting effective parenting-related factors, and possibly increasing children’s healthy diet and PA, and decreasing screen-time.Trial registrationNCT02278809 in ClinicalTrials.gov on October 28, 2014 (retrospectively registered).

Prospective association between consumption frequency of organic food and body weight change, risk of overweight or obesity: results from the NutriNet-Santé Study.

A lower BMI has been reported among consumers of organic foods, but this relationship has never been examined in a prospective design study. Our aim was to prospectively investigate the association between frequency of organic food consumption and weight change. We analysed data from 62 224 participants of the NutriNet-Santé cohort (78 % women, mean age=45 years) with information on consumption frequency of organic foods, dietary intake and repeated anthropometric data. For sixteen products, participants reported their consumption frequency of labelled organic foods (never, occasionally, most of the time). An organic score (OS) with a maximum of thirty-two points was computed. The associations of the OS (modeled as quartiles (Q)) with change in BMI during follow-up (on average 3·1 years) and with the risk of overweight and obesity were estimated by ANCOVA and multivariable logistic regression. A lower BMI increase was observed across quartiles of the OS (mean difference Q4 v. Q1=-0·16 (95 % CI -0·32, -0·01). An increase in the OS was associated with a lower risk of overweight and obesity (among non-overweight and non-obese participants at inclusion): OR for Q4 v. Q1 were 0·77 (95 % CI 0·68, 0·86) and 0·69 (95 % CI 0·58, 0·82), respectively. Concerning obesity risk, the association was stronger among participants with higher adherence to nutritional guidelines. This study supports a strong protective role of consumption frequency of organic foods with regard to the risk of overweight and obesity that depends on overall dietary quality. Upon confirmation, these results may contribute to fine-tune nutritional guidelines by accounting for farming practices in food production.

Association of dietary patterns with overweight risk and all-cause mortality in children with cancer.

BACKGROUND/OBJECTIVESThis study aimed to investigate the association of dietary patterns with overweight risk and all-cause mortality in pediatric cancer patients.SUBJECTS/METHODSProspective cohort study was undertaken; 83 cancer patients admitted to the pediatric cancer ward at a university hospital in Seoul were included and followed for obesity and death over 24 months. Food consumption data were collected from patients using validated meal order sheets for breakfast, lunch, and dinner at the pediatric cancer ward over 3 days. Using principal component analysis, three dietary patterns were derived from 29 food groups.RESULTSEighteen deaths occurred among the patient cohort during the follow-up period. The “spicy & fried meat and fish” dietary pattern was positively associated with overweight risk at both baseline [odds ratio (OR) = 4.396, 95% confidence interval (CI) = 1.111-17.385, P for trend = 0.023] and after 6 months (OR = 4.088, 95% CI = 1.122-14.896, P for trend = 0.025) as well as all-cause mortality (hazard ratios = 5.124, 95% CI = 1.080-24.320, P for trend = 0.042), when comparing the highest and lowest tertiles after adjusting for covariates. The “fish, egg, meat, and fruits & vegetables” dietary pattern was associated with lower overweight risk after 24 months (OR = 0.157, 95% CI = 0.046-0.982, P for trend = 0.084).CONCLUSIONThe results imply that dietary patterns might be associated with weight gain and premature death among pediatric cancer patients.

Excesso de peso em adolescentes: papel moderador do sexo e da escolaridade materna

Objective: To investigate the moderating effect of gender and mother’s education level on the relation between overweight and associated factors in adolescents. Methods: This is a descriptive cross-sectional study, performed with 945 students, of both sexes, aged between 14 and 18 years, of Ponta Grossa, Parana. Weight and height measurements were collected. The adolescents filled out a questionnaire addressing sociodemographic information (gender, age, occupation/work, adolescent’s address and parents’ level of education), sedentary behavior (time watching TV/at the computer), participation in Physical Education classes and practice of physical activities. For data analysis, Poisson regression was used in STATA 9.2 software, adopting a significance level of p<0.05. Results: The prevalence of overweight among the adolescents was 18.8%. There was association between overweight and the variables age and sedentary behavior. However, when the estimates were adjusted for all the other independent variables, only the ages of 15 and 16 remained associated with overweight. A moderating effect of gender was observed in the association between overweight and sedentary behavior, and a moderating effect of mother’s education on the association between adolescents’ age and prevalence of overweight. Conclusion: The prevalence of overweight in adolescents was lower in the age range of 14 to 16 years old. Nevertheless, the age increase and the presence of sedentary behaviors were associated to lower risk of being overweight among boys whose mothers had lower formal schooling. As for the girls, a lower risk of overweight was observed when mothers presented higher level of education.

Retail Environments as a Venue for Obesity Prevention.

Increasing attention has been given to the role of retail food environments in shaping dietary behavior and obesity risk. Studies have generally shown an association between living in a neighborhood with or in close proximity to certain types of food outlets and/or the availability of healthy food options and better dietary quality, higher fruit/vegetable intakes, and a lower risk of overweight, even after controlling for individual/family level characteristics. However, research in this area has yielded mixed results, overall. Future research needs to identify consistent approaches for defining and measuring food retail environments.

Travel mode, transportation-related physical activity, and risk of overweight in Taiwanese adults

Abstract Background Whether active travel and public transportation, as opposed to private vehicle use, are related to physical activity levels and the risk of overweight in Asian countries is unclear. Thus, this study examined the associations of transportation-related physical activity involving three modes of travel and the risk of overweight among Taiwanese adults. Methods Data from 51,949 Taiwanese adults were used. The examined variables were objectively-measured height and body mass, self-reported main mode of travel (private vehicle, public transport, active travel), and time spent walking and cycling for transportation using the International Physical Activity Questionnaire-long version. Logistic regression modeling was performed. Results After adjustment for potential confounders, public transportation and active travel were found to be significantly associated with a higher probability of engaging in 150 min/wk of transportation-related physical activity (odds ratio (OR)=2.35, 95% confidence interval (CI): 2.21, 2.49; OR=6.31, 95% CI: 5.95, 6.69) and a lower risk of overweight (OR=0.84, 95% CI: 0.79, 0.90; OR=0.83, 95% CI: 0.78, 0.88) compared with traveling by private motor vehicle. Similar patterns were observed in men and women. Conclusions Using public transport might be as effective as active transportation to accumulate transport-related physical activity to achieve health-enhancing level and to be associated with lower odds of being overweight in Taiwanese adults. Encouraging public transportation use could promote physical activity and be considered a promising method of preventing overweight in both men and women.

Prebiotic consumption and the incidence of overweight in a Mediterranean cohort: the Seguimiento Universidad de Navarra Project

The consumption of prebiotics (fermentable and nondigestible carbohydrates) has been proposed as a potentially protective factor against overweight and obesity. However, to our knowledge, no previous prospective studies have assessed the association between the consumption of prebiotics and the incidence of overweight or obesity. We evaluated the association between prebiotic consumption [fructans and galacto-oligosaccharides (GOSs)] and the incidence of overweight [body mass index (BMI; in kg/m(2)) ≥25] in the SUN (Seguimiento Universidad de Navarra) Project, which is a prospective cohort of Spanish, middle-aged university graduates with initial BMI <25. The SUN Project is a dynamic, prospective, multipurpose cohort of Spanish university graduates with an overall retention rate of 90%. The study population encompassed 8569 Spanish university graduates (mean age: 37 y) who were initially free of overweight or obesity. Self-reported weight (previously validated) was collected at baseline and updated every 2 y during the follow-up period. Fructan consumption and GOS consumption were assessed with the use of a validated semiquantitative 136-item food-frequency questionnaire and were updated after 10 y. Time-dependent Cox proportional hazards models were used to estimate HRs and 95% CIs for incident overweight and to adjust for potential confounding factors. During follow-up (median: 9 y), 1964 incident cases of overweight were identified. After potential confounders were adjusted for, risk of overweight was 15% lower in participants in the highest quartile of fructan consumption (≥2.3 g/d) (95% CI: 0.74, 0.97; P-trend = 0.019). Subjects in the highest quartile of GOS consumption (≥0.45 g/d) had 17% lower risk of overweight (95% CI: 0.74, 0.94; P-trend = 0.001). Higher prebiotic consumption was associated with lower risk of overweight in a cohort of initially normal-weight, middle-aged adults. This potential protection has been previously scarcely assessed; therefore, additional longitudinal studies are needed to confirm our results.

Associations between active travel and weight, blood pressure and diabetes in six middle income countries: a cross-sectional study in older adults.

BackgroundThere is little published data on the potential health benefits of active travel in low and middle-income countries. This is despite increasing levels of adiposity being linked to increases in physical inactivity and non-communicable diseases. This study will examine: (1) socio-demographic correlates of using active travel (walking or cycling for transport) among older adults in six populous middle-income countries (2) whether use of active travel is associated with adiposity, systolic blood pressure and self-reported diabetes in these countries.MethodsData are from the WHO Study on Global Ageing and Adult Health (SAGE) of China, India, Mexico, Ghana, Russia and South Africa with a total sample size of 40,477. Correlates of active travel (≥150 min/week) were examined using logistic regression. Logistic and linear regression analyses were used to examine health related outcomes according to three groups of active travel use per week.Results46.4 % of the sample undertook ≥150 min of active travel per week (range South Africa: 21.9 % Ghana: 57.8 %). In pooled analyses those in wealthier households were less likely to meet this level of active travel (Adjusted Risk Ratio (ARR) 0.77, 95 % Confidence Intervals 0.67; 0.88 wealthiest fifth vs. poorest). Older people and women were also less likely to use active travel for ≥150 min per week (ARR 0.71, 0.62; 0.80 those aged 70+ years vs. 18–29 years old, ARR 0.82, 0.74; 0.91 women vs. men).In pooled fully adjusted analyses, high use of active travel was associated with lower risk of overweight (ARR 0.71, 0.59; 0.86), high waist-to-hip ratio (ARR 0.71, 0.61; 0.84) and lower BMI (−0.54 kg/m2, −0.98;− 0.11). Moderate (31–209 min/week) and high use (≥210 min/week) of active travel was associated with lower waist circumference (−1.52 cm (−2.40; −0.65) and −2.16 cm (3.07; −1.26)), and lower systolic blood pressure (−1.63 mm/Hg (−3.19; −0.06) and −2.33 mm/Hg (−3.98; −0.69)).ConclusionsIn middle-income countries use of active travel for ≥150 min per week is more common in lower socio-economic groups and appears to confer similar health benefits to those identified in high-income settings. Efforts to increase active travel levels should be integral to strategies to maintain healthy weight and reduce disease burden in these settings.Electronic supplementary materialThe online version of this article (doi:10.1186/s12966-015-0223-3) contains supplementary material, which is available to authorized users.

Nutritional profile and obesity: results from a random-sample population-based study in Córdoba, Argentina.

Obesity is a chronic, heterogeneous, multifactorial disease, which has sharply increased in prevalence in both developed and developing countries. This study aimed to estimate the prevalence of obesity and to identify socio-demographic risk factors associated with it, with special emphasis on diet. Nutritional status, demographic characteristics, lifestyle habits, and food consumption patterns derived from a Food Frequency Questionnaire were investigated. Exhaustive exploratory analyses were performed in order to describe dietary patterns, and logistic regression models were used for odds ratio estimation. The study included 4328 subjects, over 18 years old and resident in Cordoba city. The prevalence of overweight and obesity was 34 and 17 %, respectively, with 60 % in men and 45 % in women of BMI ≥ 25. Obesity risk factors were high intake of sodium, refined grains, starchy vegetables, and snacks. A lower risk of overweight and obesity was associated with an adequate, moderate intake of meats, eggs, alcoholic beverages, sugar and sweets, milk, yogurt, and pulses. A high intake of snacks, refined grains, starchy vegetables and sodium and low intake of yogurt, milk, pulses, and whole grains seem to be associated with the emergence and high prevalence of obesity in Cordoba, Argentina.

Risk factors for overweight and overfatness in rural South African children and adolescents.

BackgroundTo determine risk factors for overweight/overfatness in children and adolescents from rural KwaZulu-Natal, South Africa.MethodsAnthropometric data were collected from a cross-sectional sample (n = 1519, ages 7, 11 and 15 years) and linked to demographic information (n = 1310 and n = 1317 in overweight and overfat analyses, respectively). Candidate risk factors for overweight/overfatness were identified and tested for associations with overweight (BMI-for-age >+1SD, WHO reference) and overfatness (>85th centile body fatness, McCarthy reference) as outcomes. Associations were examined using simple tests of proportions (χ2/Mann–Whitney U tests) and multivariable logistic regression.ResultsSex was a consistent variable across both analyses; girls at significantly increased risk of overweight and overfatness (overweight: n = 180, 73.9 and 26.1% females and males, respectively (P < 0.0001); overfat: n = 187, 72.7 and 27.3% females and males, respectively (P < 0.0001)). In regression analyses, sex and age (defined by school grade) were consistent variables, with boys at lower risk of overweight (adjusted odds ratio (AOR) 0.40 (confidence interval (CI) -0.28–0.57)) and risk of overweight increasing with age (AOR 0.65 (CI- 0.44–0.96), 0.50 (CI-0.33–0.75) and 1.00 for school grades 1, 5 and 9, respectively). Results were similar for overfatness.ConclusionsThis study suggests that pre-adolescent/adolescent females may be the most appropriate targets of future interventions aimed at preventing obesity in rural South Africa.

Association between non-nutritive sweeteners and obesity risk among university students in Latin America

The association between non-nutritive sweeteners and obesity is controversial. To determine whether the consumption of non-nutritive sweeteners is related to higher risk for overweight or obesity among university students in Chile, Panama, Guatemala and Peru. A total of 1,224 (472 from Chile, 300 from Panama, 248 from Guatemala and 204 from Peru) male and female university students aged between 18 and 26 years participated in the study. Each student reported their food intake (frequency of weekly consumption) in a survey that contained photos of foods containing non-nutritive sweeteners adapted for each country. Anthropometry was also measured. More than 80% of students consumed at least one product containing non-nutritive sweeteners. Females who ate acesulfame potassium and sucralose had a lower risk of overweight or obesity with an odds ratio (OR) of 0.5 (confidence intervals (CI) = 0.3-0.9; p = 0.003) and OR = 0.4 (IC = 0.2-0.8; p = 0.01), respectively. In this sample of Latinamerican university students, consumption of non-nutritive sweeteners was associated with lower risk of overweight only in females.

Comparisons of 6-n-Propylthiouracil (PROP) Sensitivity, Food Liking and Food Intake between Vegetarian and Non-Vegetarian Women

Background: Previous studies have suggested that vegetarians have a lower risk of overweight and obesity than do non-vegetarians. However, little is known about how meat consumption interacts with taste perception, thereby influencing food intake and body weight. Objective: The objective of this study was to examine the relationship of meat consumption with 6-npropylthiouracil (PROP) sensitivity, food liking, food intake and body mass index in female long term vegetarians and non-vegetarians. Methods: A cross-sectional design with a total of 94 racially diverse female subjects (mean age 23 years, 42 vegetarians, 52 non-vegetarians) living in the New York City area was used in this study. Body Mass Index (BMI) was calculated using the measured weight and height and PROP sensitivity was assessed using a PROP filter paper disk method and a general Labeled Magnitude Scale (gLMS). The subjects also completed a questionnaire to report the food liking/disliking for 19 food items using a hedonic version of the gLMS. Dietary intake was assessed using a food frequency questionnaire. Results: The PROP sensitivity of vegetarians was significantly higher than that of non-vegetarians. Vegetarians showed significantly less liking of fat foods than did non-vegetarians, whereas there was no significant difference in sweet foods liking. The BMI, energy, protein, fat, saturated fat, cholesterol, B vitamins, iron, zinc, sodium, potassium, and alcohol intake values of the vegetarians were significantly lower than those of the non-vegetarians. Multiple regression results revealed that only vegetarian status significantly contributed to the predictions of all the dependent variables, energy intake, fat intake and BMI. Conclusion: The study findings suggest that a difference in taste perception between vegetarians and nonvegetarians may play a role in determining energy intake and weight status. Further studies are needed to examine the mechanisms by which habitual meat consumption affect taste perception and thus food intake.

Inverse association between the frequency of nut consumption and obesity among Iranian population: Isfahan Healthy Heart Program

Recently, controversies have arisen concerning the association between nut intake and obesity. This study was performed to investigate the relationship between nut consumption and obesity among Iranian adults. In a cross-sectional survey, 9,660 randomly chosen adults aged ≥19 years were selected based on gender, age and their settlement distributions in three districts of central Iran in 2007. Nutritional behaviors including regular intake of walnuts, almonds, pistachios, hazelnuts and sunflower seed were assessed by validated 48-item-food-frequency questionnaire and a 24-h recall questionnaire. Using hierarchical logistic regression test, odds ratio (OR) 95% CI of obesity based on nut consumption was determined in an unadjusted and four adjusted models. The results showed a significant association between high nut consumption and lower prevalence of overweight or general obesity as well as abdominal obesity in women (p = 0.01 and p = 0.047, respectively), but not men. The frequency of nut consumption was associated with lower risk of overweight or general obesity [OR (95% CI) 0.57 (0.38-0.86)] and abdominal obesity [OR (95% CI) 0.51 (0.28-0.95)] only in women. After adjusting for gender, age and other potential confounders, the strength of the associations was blunted, but they were still significant. Frequent nuts and seeds consumption, particularly ≥1 time/day, had an inverse association with all classes of obesity among women.

Household and family factors related to weight status in first through third graders: a cross-sectional study in Eastern Massachusetts.

BackgroundEarly environmental influences have been linked to child weight status, however further understanding of associations in diverse populations is needed.MethodsA cross-sectional analysis of household and family factors associated with overweight was conducted on a culturally diverse, urban dwelling sample of 820 first through third graders (mean age 7.6 ± 1.0 years) residing in three eastern Massachusetts cities. Overweight was defined as BMI > 85th percentile, based on measured height and weight, and the CDC growth reference. Multivariate logistic regression was used to identify demographic, behavioral, and social environmental variables significantly related to weight status. Independent variables included race-ethnicity, age, sex, servings of sugar-sweetened beverages/week, hours of screen time/week, parent overweight, (calculated from self-reported weight/height), parent education, household food restriction rules regarding snacking and/or kitchen access, frequency of having dinner as a family (reported as “a lot” vs. “sometimes/rarely/never”) and child vitamin/mineral supplement use. Selected interactions were explored based on prior studies.ResultsPrevalence of overweight was 35.5% in girls and 40.8% in boys. In the final, adjusted model, compared to white children, the odds of overweight were higher in children of Hispanic race-ethnicity (odds ratio (OR) = 2.4, 95% CI = 1.4 - 4.1). In the same adjusted model, compared to children with no household food restriction rules, the odds of overweight were 2.6 (95% CI = 1.3-5.1) times higher and 3.5 (95% CI = 1.9-6.4) times higher for children having one rule or two rules, respectively. Parent report of frequent family dinner and child vitamin use were protective, with a halving of risk for overweight for each behavior (OR = 0.47, 95% CI = 0.31-0.71 and OR = 0.54, 95% CI = 0.37-0.78, respectively).ConclusionsIn the presence of other factors, frequent family dinner and vitamin use were associated with lower risk of overweight and household food restriction rules with higher risk. Although such relationships have previously been reported, this investigation is among the first to demonstrate these associations in a low-income, racially-diverse early elementary school population, and suggest potential targets of opportunity within the family context that could reduce child overweight risk in a subgroup of children at elevated risk of obesity.

Abstract P207: Sociodemographic Predictors of Overweight or Obese Incidence Among Normal Weight 18-Year Olds

The transition from adolescence to adulthood is associated with increased risk for excess weight gain. Transitioning adults are relatively difficult to study, however, because unless they matriculate to secondary education there are few opportunities to track them. Thus, demographic and socioeconomic factors associated with overweight obesity are not well-documented, much less so among adolescents who have maintained normal weight throughout adolescence. We examined the incidence of overweight and obesity among 10,723 healthy, normal weight (body mass index [BMI] &lt; 25 kg/m 2 )18-year olds in 2008 who remained members of Kaiser Permanente Southern California through 2012. Sex, race/ethnicity, height, and weight were recorded in electronic medical records; BMI was calculated. Neighborhood education was determined from US 2000 Census block group data, and quartiles defined by the proportion of adults with an education below high school. We followed 3,677 men (BMI: 21.5±1.96) and 7,046 women (BMI: 21.2±2.0). Relative risks (RR) and 95% confidence intervals (CI) were determined controlling for sex, race/ethnicity, neighborhood education, and smoking history. During 34,660 person-years of follow-up (mean 3.23±1.34 years), we documented 2,672 incident cases of overweight (24.9%) and 237 of obesity (2.2%). The RR of overweight was 1.25 (95% CI: 1.13, 1.38) in the lowest quartile of neighborhood education compared with the highest quartile (test for trend p=0.001). The RR for obesity was 1.50 (95% CI: 1.00, 2.25; test for trend p=0.025). While women were less likely to become overweight than men (RR 0.88, 95% CI: 0.82, 0.94), they were twice as likely to become obese (RR: 1.99, 95% CI: 1.45, 2.72). Hispanics had greater risk of overweight (RR: 1.09, 95% CI: 1.00, 1.18) and Blacks had greater risk of obesity (RR: 1.46, 95% CI: 1.00, 2.15) than non-Hispanic whites. Compared with their non-Hispanic white peers, Asians had lower risk of overweight and obesity (RR: 0.79, 95% CI: 0.67, 0.93 and RR: 0.46, 95% CI: 0.21, 0.99, respectively). In conclusion, normal weight adolescents are at risk for becoming overweight as they transition to adulthood. Sociodemographic factors predict incidence of overweight and obesity. Women and Blacks are at particular risk for excessive weight gain trajectories.

Why are educated adults slim—Causation or selection?

More educated adults tend to have lower body mass index (BMI) and a lower risk of overweight and obesity. We contrast two explanations for this education gradient in BMI. One explanation is selection: adolescents with high BMI are less likely to plan for, attend, and complete higher levels of education. An alternative explanation is causation: higher education confers lifelong social, economic, and psychological benefits that help adults to restrain BMI growth. We test the relative importance of selection and causation using data from the National Longitudinal Survey of Youth, 1997 cohort (NLSY97), which tracks self-reported BMI from adolescence (age 15) through young adulthood (age 29).Ordinal regression models confirm the selection hypothesis that high-BMI adolescents are less likely to complete higher levels of education. Selection has primarily to do with the fact that high-BMI adolescents tend to come from socioeconomically disadvantaged families and tend to have low grades and test scores. Among high-BMI girls there is also some evidence that educational attainment is limited by bullying, poor health, and early pregnancy. About half the selection of high-BMI girls out of higher education remains unexplained.Fixed-effects models control for selection and suggest that the causal effect of education on BMI, though significant, accounts for only one-quarter of the mean BMI differences between more and less educated adults at age 29. Among young adults, it appears that most of the education gradient in BMI is due to selection.

The association of birth weight with cardiovascular risk factors and mental problems among Iranian school-aged children: The CASPIAN-III Study

ObjectiveBoth high and low birth weights (HBW and LBW) are risk factors for adulthood diseases. The aim of this study was to investigate the association of birth weight with cardiovascular disease (CVD) risk factors and mental problems among Iranian school-aged children. MethodsThis national multicenter study of school-aged children entitled CASPIAN III was conducted among 5528 students in ranging from ages 10 to 18 y. Biochemical indices and anthropometric measurements were collected. Mental health was assessed by questionnaire. To investigate the association between birth weight categories and CVD risk factors and mental problems, multivariate logistic regression was used. ResultsHBW adolescents were at higher risk for elevated diastolic blood pressure (DBP) (Ptrend < 0.05), low levels of high-density lipoprotein cholesterol (HDL-C) (Ptrend < 0.05), and lower risk for general obesity (Ptrend < 0.05) compared with the LBW category. HBW had no significant association with mental problems (Ptrend > 0.05) compared with LBW adolescents. The results of regression analysis, which considered normal birth weight as the reference group, showed that LBW students had lower risk for overweight and obesity (P < 0.01), as well as higher DBP (P < 0.05) but they were at higher risk for lower levels of HDL-C (P < 0.01). Furthermore, birth-weight categories had a U-shaped relationship with mental problems and sleep disorders (P < 0.05). Risk for confusion was higher among the LBW group (P < 0.05). ConclusionFindings from this population-based study revealed a positive relation between birth weight categories and CVD risk factors. Compared with students born with normal weight, those born with HBW and LBW were at higher risk for mental problems, sleep disorders, and confusion.

Breastfeeding and food pattern in overweight children in the Caribbean

Background: As in most countries around the globe, overweight and obesity are a major threat to public health on the Caribbean island of Aruba. Increasing evidence confirms that breastfeeding protects against overweight and obesity. However, little is known about the mechanism underlying the association between breastfeeding and obesity. One possibility is that breastfed infants are better able to control their meal size and intervals than formula-fed infants. This might lead to a healthier diet in later life and protect against overweight and obesity.Objective: To determine the relationship between breastfeeding, food pattern and being overweight in the Caribbean.Methods: In a cross-sectional school-based study in 2004–2005, weight and height were measured by two research assistants in 1776 children aged 6–11 years on Aruba, an island in the Caribbean. BMI was defined according to guidelines by the International Obesity Task Force. Parents completed a questionnaire pertaining to breastfeeding and dietary food pattern.Results: 1451/1776 (81·7%) children were breastfed; 851/1766 (47·9%) children were breastfed for <4 months, 227/1776 (12·8%) for 4–6 months and 373/1776 (21·0%) for ≧6 months. Children who were breastfed for ≧4 months had lower odds (OR 0·32, 95%CI 0·25–0·40) of being overweight including obesity than those who either were not breastfed or who were breastfed for <4 months. Children who were breastfed for ≧4 months were more likely to have a structured food pattern of six eating moments a day (OR 7·43, 95% CI 5·87–9·39, P<0·001) and to have breakfast every day (OR 2·86, 95% CI 2·17–3·78, P<0·001) than those who were not or who were breastfed for <4 months.Conclusions: Breastfeeding for ≧4 months is associated with a structured food pattern (six eating moments a day including a daily breakfast) and carries a strikingly lower risk of overweight in children. Promoting prolonged breastfeeding together with a focus on a subsequent structured food pattern could be a cheap method of preventing overweight.

Prevalence of Obesity among Young Asian-American Children

Asian-American children are considered to be at low risk of obesity, but previous estimates have not distinguished between children from different Asian countries. We estimate the prevalence of obesity among Asian-American children by mother's country of origin, generational status, and family socioeconomic factors using a secondary analysis of the Early Childhood Longitudinal Study-Birth Cohort (ECLS-B) wave III (children ∼4 years old) dataset. The ECLS-B is a nationally representative study of children born in 2001 that oversampled births to Asian mothers. Asian ethnic categories included Chinese, Japanese, Filipino, Asian Indian, Korean, Vietnamese, and Other Asian/Pacific Islander. The primary outcome variable was weight status; overweight = BMI ≥85(th) and obese = BMI ≥95(th) percentile for age and gender. Twenty-six percent [95% confidence interval (CI) 23.6-29.1] of Asian-American 4 year olds were overweight or obese, and 13% (95% CI 10.2-15.2) were obese. Chinese-American children were at lower risk of overweight or obesity (23.5%, 95% CI 18.4-29.5 ) compared to whites (36%, 95% CI 34.3-37.7); Asian-Indian 4 year olds had the lowest rates of overweight or obesity (15.6%, 95% CI 8.0-28.2) and were most likely to be underweight (10%, 95% CI 4.9-19.4). Among Asians,Vietnamese-American children had the highest rate of overweight or obesity (34.7%, 95% CI 0.6-52.3). Vietnamese-American children are at elevated risk of obesity and overweight, whereas Chinese and Asian-Indian children are at low risk. After controlling for Asian ethnicity, maternal education, and household poverty status, Asian-American children whose mothers were born outside the United States were less likely to be obese [odds ratio = 0.55 (0.32-0.95), p = 0.03].