To investigate the effects of nutritional intervention on weight change and blood sugar control in diabetic patients with obstructive sleep apnea (OSA).
Type 2 diabetic patients with OSA were analyzed their weight and HbA1c before and after 1 year nutritional intervention (NI group), and compared the patients without nutritional intervention (non-NI group). All patients were treated OSA with continuous positive airway pressure. The patients who changed medicine were excluded.
In NI group (n=14, 59.6±3.1years, the rate of drug treatment 29%), their HbA1c were significantly decreased from 7.5±0.2 to 7.2±0.2 %（p＜0.05）. In non-NI group (n=32, 55.3± 1.6years, the rate of drug treatment 38%), their HbA1c were changed (6.8±0.1 and 7.1±0. 1 %). In both groups, their BMI before and after nutritional intervention were not changed significantly（30.6±1.6 and 30.2±1.4 kg/m2 in NI group, 31.0±0.9 to 30.9±0.8kg/m2 in non- NI group).Additional analysis in 23 patients that decreased their BMI, HbA1c decreased only in NI group.NI group received 4.0±0.7 times of the nutrition counseling, they could change to less drink juice, alcohol, and the amount of food.
This study may suggest that the nutrition intervention improve blood sugar control by different mechanisms of body weight change in diabetic patients with OSA