A recently published article in PLoS One examined whether the supermarket where people do most of their food shopping is associated with body weight and fat.
The study showed that the 7131 participants were shopping in 1097 different supermarkets. Almost 90% of the participants were shopping out of their immediate residential neighborhood.
The study suggests that two persons who were shopping in the same supermarket had a more similar body mass index and waist circumference than participants who were shopping in different supermarkets.
The analyses showed that shopping in specific supermarket brands, especially in specific hypermarkets and specific hard discount supermarkets, and in supermarkets attracting low educated customers was associated with a higher body mass index and a larger waist circumference.
The study also demonstrates that shopping in a hard discount supermarket was not associated with body weight and fat among participants with a high educational level, but that shopping in a hard discount was related to a higher body mass index and larger waist circumference with decreasing educational level of the participants.
These findings do not allow one to conclude to a causal effect of the primary supermarket used for food shopping. However, they suggest that supermarkets represent a relevant place to develop nutritional interventions. The study could be used to identify the supermarkets where such nutritional interventions would be most beneficial.
The sixth information letter of the RECORD Study has been sent to the participants of the study.
This letter describes the RECORD GPS Study that we currently implement, in which participants are invited to wear a GPS and an accelerometer for 7 days.
The letter also reports two articles related to our recent work. The first article is devoted to recreational walking, while the second is interested in the practice of jogging. Both analyses investigate relationships between multiple characteristics of residential environments, experiences made by individuals in their neighborhood, weather over the previous days, and physical activity behavior over the same period.
Enjoy your reading!
In this article, Cinira Lefèvre examined whether different characteristics of the physical environment, service environment, and social-interactional environment were associated with the body mass index and waist circumference of the RECORD participants
The analyses suggest that, beyond socioeconomic characteristics of individuals and of their residential neighborhood, waist circumference was larger among participants residing in a neighborhood with a low building density, and where the densities of fruit and vegetable shops and restaurants (full service and fastfoods) and density of destinations were weak. Overall, the likelihood of excess fat was higher in non-dense neighborhoods.
However, analyses based on innovative approaches revealed that it is difficult to disentangle the effects of the different characteristics of the physical and service environment on excess body weight and fat, especially when these environmental factors are related to densities that are highly correlated with each others.
We therefore found it more reliable to only conclude to the existence of an overall protective effect of high densities in general.
The article can be downloaded here.
A new article based on the RECORD Study, related to the determinants of resting heart rate, has been accepted for publication in Social Science and Medicine.
At the individual level, a higher resting heart rate was observed among low educated participants and blue-collar workers, among participants who did not own their dwelling, and among those who did not have holidays over the previous year. Beyond and above individual factors, we found resting heart rate to increase with decreasing average education level of residents of the residential neighborhood.
Combining individual and neighborhood socioeconomic factors in a risk score, resting heart rate was increased by 1.1 beat per minute, 1.7 beat per minute, and 3.8 beats per minute in the three more and more disadvantaged socioeconomic groups, compared to the most advantaged one.
A mediation analysis showed that about 20% of the relationship between socioeconomic status and resting heart rate was attributable to the less frequent sport practice of disadvantaged populations, that 15% of the relationship was related to their higher resting heart rate, and that only 4% of the relationship was attributable to the shorter legs (and related risk factors) of disadvantaged participants.
The article can be downloaded here.
A new article describing the RECORD Study will soon appear in the International Journal of Epidemiology.
This document describes the main research hypotheses of the RECORD project and its objectives. It also provides an exhaustive list of the data collected in the study, with a particular interest for the data collection procedures implemented in the second wave of the study (e.g., related to the mobility data). Finally, the article summarizes the first set of findings obtained from the RECORD Study.
The fifth information letter of the RECORD Cohort Study has just been sent to the participants of the study.
This letter includes two articles. The first study reported investigates whether there are relationships between the brand and characteristics of supermarkets where people shop and excess weight and abdominal fat. The second work is interested in the relationships between, on the one hand, multiple characteristics of the physical environment, of the service environment, and of the social-interactional environment, and on the other hand, body mass index and waist circumference.
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Since February 2011, we have started to invite all of the participants of the RECORD Study to a second health examination and to a second survey wave.
Coordinated by Inserm and by University Pierre et Marie Curie, the second study wave is conducted in collaboration with the Centre d’Investigations Préventives et Cliniques and the University of Montreal.
We have already interviewed and examined 880 participants.
Based on a second measurement of cardiovascular risk factors 4 or 5 years after the baseline measures, we will investigate the extent to which social characteristics of participants and the multiple characteristics of their residential neighborhoods are associated with changes in the cardiovascular risk profile over time.
Moreover, the second wave of the study is particularly interested in mobility, and geocodes a number of activity places to which people regularly go. These data should allow us to incorporate patterns of mobility and “spatial behavior” in the investigation of the effects of the environments on health.
In a second article accepted for publication in the US journal Epidemiology, Cinira Leal investigated, in the context of her PhD, the relationships between neighborhood socioeconomic status and body mass index or waist circumference in the Ile-de-France region.
In terms of methodology, the whole point is to know whether the empirical data available to us really allow us to conclude that there are relationships between neighborhood socioeconomic status and body mass index or waist circumference after adjustment for individual socioeconomic characteristics. Authors in the international scientific literature have suggested that such associations may be based on excessive extrapolations of regression models used for the analyses.
On the contrary, the work shows that it is possible to conclude, at least in the French Ile-de-France region, that body mass index and waist circumference increase regularly with decreasing socioeconomic status, especially average educational level, of the neighborhood.
The authors wish to thank the Ile-de-France Regional Health Agency, IReSP, and InVS for their support in this particular work.
Following the call for project 2010 of IReSP, we initiate a new project that aims to provide information to interventions seeking to reduce the prevalence of metabolic risk factors through the early detection of these risk factors and their medical control.
The objectives of the project are the following:
(i) examine whether there are disparities in the spatial accessibility to healthcare services in the study territory;
(ii) study social and spatial disparities in the biological screening of metabolic risk factors, medical follow-up, and access to recommended antihypertensive and lipopenic treatments;
(iii) explore the mechanisms contributing to these disparities by taking into account, in a multilevel perspective, factors related to the residential environment of participants, to the physicians and to their geographic context of practice, and to the individual level.
We gratefully thank INPES and IReSP, as well as CNAM-TS, for their support in this project.
UMR-S 707 is involved in a comprehensive work related to the health of the population of Paris coordinated by the Ile-de-France Regional Health Observatory for the Health Department of the City of Paris.
Analyses of the data collected for 2128 participants residing in Paris in the context of the RECORD Study will provide additional information related to the health of the population of Paris.
We thank the Health Department of the City of Paris, and particularly Ghislaine Grosset.