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[The Association Between Food Prices and the Blood Glucose Level of US Adults With Type 2 Diabetes]
Tobenna D Anekwé1, Llya Rahkovsky1
1Servicio de Investigaciones Económicas, Departamento de Agricultura de los Estados Unidos, Washington, D. C., Estados Unidos de América, tanekwe@ers.usda.gov.
Objectives:
We estimated the association between the price of healthy and less-healthy food groups and blood sugar among US adults with type 2 diabetes.
Methods:
We linked 1999-2006 National Health and Nutrition Examination Survey health information to food prices contained in the Quarterly Food-at-Home Price Database. We regressed blood sugar levels on food prices from the previous calendar quarter, controlling for market region and a range of other covariates. We also examined whether the association between food prices and blood sugar varies among different income groups.
Results:
The prices of produce and low-fat dairy foods were associated with blood sugar levels of people with type 2 diabetes. Specifically, higher prices for produce and low-fat dairy foods were associated with higher levels of glycated hemoglobin and fasting plasma glucose 3 months later. Food prices had a greater association with blood sugar for low-income people than for higher-income people, and in the expected direction.
Conclusions:
Higher prices of healthy foods were associated with increased blood sugar among people with type 2 diabetes. The association was especially pronounced among low-income people with type 2 diabetes.
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