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19-09-2011 | Diabetes | Article

Fast eaters have increased IGT risk


Full abstract

MedWire News: Eating quickly is a potent risk factor for the development of impaired glucose tolerance (IGT), say Japanese researchers.

Until now the association between eating patterns and the risk for IGT and Type 2 diabetes has not been investigated, despite its importance in medical nutritional therapy, they say.

As reported in the journal Diabetes Research and Clinical Practice, Hirohito Sone (University of Tsukuba, Japan) and colleagues examined data on 172 Japanese adults (mean age 49.4 years) who had undergone voluntary medical check-ups at Tsukuba Medical Center, including a 75-g oral glucose tolerance test (OGTT).

They recorded the participants' self-reported eating patterns and found that 44% admitted to "eating fast," 15% to "skipping meals," 19% to "snacking frequently," 42% to "late-night eating," and 22% to "eating out frequently."

The authors then performed a follow-up OGTT 3 years later, which revealed IGT in 39 individuals (33 men and 6 women), including two cases of Type 2 diabetes.

Importantly, fast eating was significantly associated with the risk for developing IGT, at an odds ratio (OR) of 2.47. No other eating pattern predicted IGT risk.

Further analysis revealed that the relationship between fast eating and IGT remained significant after adjusting for body mass index (BMI), at an OR of 2.43.

"Therefore, it is unlikely that eating fast increased IGT mainly through obesity, which is known to increase insulin resistance and become a risk factor for Type 2 diabetes," write Sone and team.

"Another hypothesis is that eating fast could increase postprandial blood glucose," they suggest.

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By Sally Robertson