A City Guide To Mengyin for e. the size of the gap between the rich and poor within each country was. The correlation between the two variables was a remarkable the higher Plate Just kids hanging around. But how will their life circumstances affect their health and perhaps that of others? Source Photofusion Picture Library/Rober Brook HEALTH DIFFERENTIALS the income disparity across the population, the worse its overall health. Longitudinal data also contribute to the strength of his argument. Forwell tracked average age of mortality and income distribution in Glasgow between the years and During this period, there was a significant increase in the income distribution within the population the income of the richer section of society increased significantly more than that of the people in the lower SES groups. As these income disparities increased over this period, so did rates of premature mortality across the lower-income groups, despite their access to material goods, food, clothing and so on, remaining relatively constant over time, or even improving. A City Guide To Mengyin 2016.