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News

Association between Casino opening or expansion and risk of childhood obesity

This week's issue of the Journal of the American Medical Association investigates the association between Casino opening or expansion and risk of childhood obesity.

News image

Economic resources have been inversely associated with risk of childhood overweight/obesity.

Few studies have evaluated whether this association is a direct effect of economic resources or is attributable to unmeasured confounding or reverse causation.

American Indian–owned casinos have resulted in increased economic resources for some tribes and provide an opportunity to test whether these resources are associated with overweight/obesity.

Dr Jessica Jones-Smith and colleagues assessed whether openings or expansions of American Indian–owned casinos were associated with childhood overweight/obesity risk.

The team used repeated cross-sectional anthropometric measurements from fitness testing of American Indian children (aged 7-18 years) from 117 school districts that encompassed tribal lands in California between 2001 and 2012.

48% of the anthropometric measurements were classified as overweight/obese
Journal of the American Medical Association

Children in school districts encompassing American Indian tribal lands that either gained or expanded a casino were compared with children in districts with tribal lands that did not gain or expand a casino.

The team's main outcomes were per capita annual income, median annual household income, percentage of population in poverty, total population, child overweight/obesity, and BMI z score.

The research team found that of the 117 school districts, 57 gained or expanded a casino, 24 had a preexisting casino but did not expand, and 36 never had a casino.

The mean slots per capita was 7, and the median was 3.

Among districts where a casino opened or expanded, the mean change in slots per capita was 13, and the median was 3.

The research team classified 48% of the anthropometric measurements as overweight/obese.

Every casino slot machine per capita gained was associated with an increase in per capita annual income, and a decrease in percentage in poverty among American Indians living on tribal lands.

Among American Indian children, every slot machine per capita gained was associated with a decreased probability of overweight/obesity by 0.19% points, and a decrease in BMI z score.

Dr Jones-Smith's team concludes, "In this study, opening or expanding a casino was associated with increased economic resources and decreased risk of childhood overweight/obesity."

"Given the limitations of an ecological study, further research is needed to better understand the mechanisms behind this association."

JAMA 2014; 311(9): 929-936
06 March 2014

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