Insulin levels and neck circumference are the two strongest predictors of the risk of obstructive sleep apnoea, a leading obesity expert says.Speaking at the recent Australian Doctor/HealthEdGP Summit on Diabetes, Obesity and Heart Disease in Sydney, Associate Professor John Dixon said a neck circumference of 43cm or more for men and women was a clear predictor of obstructive sleep apnoea.In obese patients, symptoms were not a good predictor because almost all people who had a BMI of 35 or more snored when they were sleeping, said Professor Dixon, from the Centre for Obesity Research and Education at the Alfred Hospital in Melbourne. Daytime sleepiness was not a useful indicator because this was common among obese patients anyway, Professor Dixon said.Neck...
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