It is prevalence of Type 1 diabetes in HIPCs. These 40 countries represent almost exactly 10% of the world population. Type 1 diabetes prevalence in these countries about 0,53% from world Type 1 prevalence. This is because diabetes incidence is much lower in tropical countries and life expectancy so short, means that the prevalence of Type 1 diabetes much lower than would be predicted from the low incidence alone.