1. Overview & Epidemiology
Indigenous peoples in Canada (First Nations, Inuit, and Métis) experience a disproportionately high burden of Type 2 diabetes compared to the general population.
Prevalence: The age-standardized prevalence of diabetes is significantly higher in Indigenous populations (e.g., 17.2% among First Nations individuals living on-reserve vs. 5.0% in the general population).
Earlier Onset: Diabetes is diagnosed at a younger age in Indigenous peoples, leading to longer disease duration and higher rates of complications (renal failure, lower limb amputation, cardiovascular disease).
Etiology: The high prevalence is linked to a complex interplay of genetic susceptibility, environmental factors, and the social determinants of health resulting from colonization.
2. The Impact of Colonization
Understanding the root causes is a critical competency for CDEs working with this population.
Colonization as a Driver: The guidelines explicitly identify colonization as a key determinant of health.
Policies like residential schools, forced relocation, and the reservation system disrupted traditional lifestyles, food systems, and cultural practices.
Trauma-Informed Care: Health-care providers must practice “trauma-informed care,” recognizing the impact of intergenerational trauma and avoidance of re-traumatization in the healthcare setting.
Food Insecurity: High rates of food insecurity (especially in northern/remote communities) contribute significantly to obesity and diabetes risk.
3. Screening Recommendations
Due to the high risk and earlier onset, standard adult screening guidelines (starting at age 40) are insufficient.
Adults: Screening should be considered earlier and at more frequent intervals in Indigenous adults.
Note: While a specific age isn’t strictly defined in the “Recommendations” box of this specific chapter, other chapters (Screening) typically suggest starting at age 18 or earlier if additional risk factors are present.
Children & Adolescents: Screening should be targeted at those with risk factors. (Refer to Chapter 35: Screening usually starts at puberty or age 10).
4. Prevention & Management Strategies
Effective management requires cultural safety and addressing the specific metabolic profile.
A. Prevention (Prediabetes)
Lifestyle: Culturally appropriate healthy behaviour interventions are the cornerstone.
Pharmacotherapy: Metformin should be considered for Indigenous adults with prediabetes to prevent/delay progression to Type 2 diabetes.
B. Management of Type 2 Diabetes
Holistic Approach: Management plans should incorporate traditional knowledge, foods, and activities where possible.
Barriers: Be aware of geographical barriers (remote access), cost of healthy food, and lack of clean drinking water in some communities.
C. Pregnancy & Women of Childbearing Age
High Risk: Indigenous women have high rates of gestational diabetes (GDM) and pre-existing Type 2 diabetes in pregnancy.
Cycle of Risk: In utero exposure to hyperglycemia increases the child’s risk of developing obesity and Type 2 diabetes early in life, perpetuating the epidemic.
Screening:
Early Screening: Screen for overt diabetes early in pregnancy.
Postpartum: Mandatory screening for Type 2 diabetes in women with a history of GDM to allow for early intervention.
5. Diabetes Canada 2018 Clinical Practice Guidelines Recommendations
Key takeaways from the “Recommendations” section (Page S303).
Screening: Screening for diabetes in Indigenous peoples should be carried out earlier and at more frequent intervals than in the general population [Grade D, Consensus].
Prevention:
Culturally appropriate healthy behaviour interventions should be initiated for those at risk [Grade B, Level 2].
Metformin may be used in Indigenous adults with prediabetes to prevent or delay type 2 diabetes [Grade D, Consensus].
Pregnancy:
Screening for diabetes in pregnancy should be performed early (before the standard 24-28 weeks) to detect pre-existing diabetes [Grade D, Consensus].
Postpartum screening should be performed in women with a history of GDM [Grade D, Consensus].
Management Programs: Management programs should be culturally safe, community-based, and address the social determinants of health [Grade D, Consensus].