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Canadian Diabetes Association 2013 Clinical Practice Guidelines. Reducing the Risk of Developing Diabetes. Chapter 5 Thomas Ransom, Ronald Goldenberg, Amanda Mikalachki , Ally PH Prebtani , Zubin Punthakee. Key Points. 2013.
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Canadian Diabetes Association 2013 Clinical Practice Guidelines Reducing the Risk of Developing Diabetes Chapter 5 Thomas Ransom, Ronald Goldenberg, Amanda Mikalachki, Ally PH Prebtani, ZubinPunthakee
Key Points 2013 • At this time, there are no safe and effective strategies to prevent T1DM • Intensive lifestyle modification with weight loss can reduce the risk of progression from pre-diabetes to T2DM by almost 60% • Progression from pre-diabetes to T2DM can be reduced by Metformin or Acarbose by approximately 30%
No Safe and Effective Strategies to Prevent T1DM at this Time • T1DM is a chronic autoimmune condition with destruction of pancreatic beta cells • Ongoing or completed trials • ENDIT: High-dose nicotinamide – Not effective • DPT-1: Low-dose insulin in high risk relatives – Not effective overall • TRIGR: Exclusion of cow’s milk protein to infants until 6-8 months of age – Trial ongoing • Alternate strategy to use immunosuppression / modulation at the time of diagnosis but significant side effects and ethical considerations
Benefit of diet and exercise or Metformin on diabetes prevention in at-risk patients • N = 3234 with IFG and IGT, without diabetes 40 Placebo P* < 0.001 Metformin 30 Cumulative incidence of diabetes (%) 31% 20 Lifestyle < 0.001 58% 10 *vs placebo IFG = impaired fasting glucose, IGT = impaired glucose tolerance 0 0 1.0 2.0 3.0 4.0 Years Diabetes Prevention Program (DPP) Diabetes Prevention Program (DPP) Research Group. N Engl J Med 2002;346:393-403.
1.00 Acarbose Placebo 0.95 0.90 0.85 0.80 0.75 0.70 Cumulative probability 0.65 0.60 0.55 0.50 0.45 P = 0.0022 0.40 0 100 200 300 400 500 600 800 900 700 1000 1100 1200 1300 Days after randomization STOP-NIDDM StudyEffects of Acarbose on the risk of T2DM N = 1429 people with IGT, BMI 25-40, 40-70 yrs, 3.3 years follow up Acarbose 25% Chiasson JL, et al. Lancet 2002;359:2072-77.
Pharmacology to Reduce Progression to T2DM • Metformin has been shown to reduce the incidence of T2DM by approximately 30% in the Diabetes Prevention Program (DPP) • Acarbose has been shown to reduce the risk of progression to diabetes by approximately 30% in the Study to Prevent Non-Insulin Dependent Diabetes (STOP-NIDDM) study
Recommendation 1 and 2 2013 • A structured program of lifestyle modification that includes moderate weight loss and regular physical activity should be implemented to reduce risk of T2DM in individuals with IGT[Grade A, Level 1A] or IFG[Grade B, Level 2]or A1C 6.0-6.4% [Grade D, consensus]. • In individuals with IGT, pharmacologic therapy with Metformin[Grade A, Level 1A]or Acarbose[Grade A, level 1A] may be used to reduce the risk of T2DM.
CDA Clinical Practice Guidelines http://guidelines.diabetes.ca – for professionals 1-800-BANTING (226-8464) http://diabetes.ca – for patients