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Abstract
BackgroundOur hypothesis was that a modified diet would improve blood glucose control with beneficial impact on weight management and overall health in established diabetes.ObjectiveThis prospective interventional study investigated the clinical effect of an Okinawan-based Nordic diet on anthropometry, metabolic control, and health-related quality of life (HRQoL) in Scandinavian type 2 diabetes patients.DesignFood was prepared and delivered to 30 type 2 diabetes patients. Clinical information along with data on HRQoL, blood samples, and urine samples were collected during 12 weeks of diet interventions, with follow-up 16 weeks after diet completion.ResultsAfter 12 weeks of dietary intervention, a reduction in body weight (7%) (p<0.001), body mass index (p<0.001), and waist circumference (7.0 cm) (p<0.001) was seen. Improved levels of proinsulin (p=0.005), insulin (p=0.011), and fasting plasma glucose (p<0.001) were found already after 2 weeks; these improved levels remained after 12 weeks when lowered levels of C-peptide (p=0.015), triglycerides (p=0.009), total cholesterol (p=0.001), and low-density lipoprotein-cholesterol (p=0.041) were also observed. Insulin resistance homeostasis model assessment for insulin resistance was lowered throughout the study, with a 20% reduction in hemoglobin A1c levels (p<0.001) at week 12, despite reduced anti-diabetes treatment. Lowered systolic blood pressure (9.6 mmHg) (p<0.001), diastolic blood pressure (2.7 mmHg) (p<0.001), and heart and respiratory rates (p<0.001) were accompanied by decreased cortisol levels (p=0.015) and improvement in HRQoL. At follow-up, increased levels of high-density lipoprotein-cholesterol were found (p=0.003).ConclusionThis interventional study demonstrates a considerable improvement of anthropometric and metabolic parameters and HRQoL in Scandinavian type 2 diabetes patients when introducing a modified Okinawan-based Nordic diet, independently of exercise or other interventions. Through these dietary changes, anti-diabetes treatment could be decreased or cancelled.
Highlights
Our hypothesis was that a modified diet would improve blood glucose control with beneficial impact on weight management and overall health in established diabetes
The aim of this study was to investigate the clinical effect of a modified Okinawan-based Nordic diet on anthropometry, metabolic control, and health-related quality of life (HRQoL) in Scandinavian type 2 diabetes subjects
Statistical analyses A power analysis was performed based on previous studies of occasional subjects, and we found that at most nine subjects were needed to demonstrate clinically important differences in hemoglobin A1c (HbA1c), total cholesterol, systolic blood pressure, and weight and 18 subjects to demonstrate clinically important differences in diastolic blood pressure with 80% power at 5% significance level
Summary
Our hypothesis was that a modified diet would improve blood glucose control with beneficial impact on weight management and overall health in established diabetes. Objective: This prospective interventional study investigated the clinical effect of an Okinawan-based Nordic diet on anthropometry, metabolic control, and health-related quality of life (HRQoL) in Scandinavian type 2 diabetes patients. Conclusion: This interventional study demonstrates a considerable improvement of anthropometric and metabolic parameters and HRQoL in Scandinavian type 2 diabetes patients when introducing a modified Okinawan-based Nordic diet, independently of exercise or other interventions. Through these dietary changes, anti-diabetes treatment could be decreased or cancelled
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