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Study: Living Near Fast Food Linked to Obesity

  • Spence Cooper
  • June 18, 2009
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Researchers in a Canadian study determined residents living in an area highly concentrated with fast food restaurants and convenience stores have a higher risk of obesity. Science Daily reports “John Spence from the University of Alberta, Canada, worked with a team of researchers to study associations between the ‘Retail Food Environment Index’ (RFEI) and levels of obesity”.

Spence said, ‘The RFEI is based upon a ratio of the number of fast-food restaurants and convenience stores to supermarkets and specialty food stores in a given radius around a person’s house. We’ve shown that it correlates very well with the odds that that person may be obese'”.

The easy access to fast food and inadequate retail outlets for natural foods within a given distance of a person’s residence is associated with weight; the RFEI radius did not have the same effect. “These findings,” said Spence, “may help explain the observation that geographic concentration of fast-food restaurants is associated with mortality and hospital admissions for acute coronary events in Canada”.

Research Article Abstract – Biometric Central Public Health:

Background

Outside of the United States, evidence for associations between exposure to fast-food establishments and risk for obesity among adults is limited and equivocal. The purposes of this study were to investigate whether the relative availability of different types of food retailers around people’s homes was associated with obesity among adults in Edmonton, Canada, and if this association varied as a function of distance between food locations and people’s homes.

Methods

Data from a population health survey of 2900 adults (18 years or older) conducted in 2002 was linked with geographic measures of access to food retailers. Based upon a ratio of the number of fast-food restaurants and convenience stores to supermarkets and specialty food stores, a Retail Food Environment Index (RFEI) was calculated for 800 m and 1600 m buffers around people’s homes. In a series of logistic regressions, associations between the RFEI and the level of obesity among adults were examined.

Results

The median RFEI for adults in Edmonton was 4.00 within an 800 m buffer around their residence and 6.46 within a 1600 m buffer around their residence. Approximately 14% of the respondents were classified as being obese. The odds of a resident being obese were significantly lower (OR = 0.75, 95%CI 0.59 – 0.95) if they lived in an area with the lowest RFEI (below 3.0) in comparison to the highest RFEI (5.0 and above). These associations existed regardless of the covariates included in the model. No significant associations were observed between RFEI within a 1600 m buffer of the home and obesity.

Conclusions

The lower the ratio of fast-food restaurants and convenience stores to grocery stores and produce vendors near people’s homes, the lower the odds of being obese. Thus the proximity of the obesogenic environment to individuals appears to be an important factor in their risk for obesity.

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