Heart disease and migration to cities go hand in hand, a scientific study has found. Diabetes, obesity, alcohol use and hypertension - four of the primary factors in cardiovascular disease - were higher among Xhosa people in the Cape Town township of Langa than they were in Mount Frere, in the Eastern Cape.Tobacco use was higher in the rural group, and women's health was worse than men's in both groups.Researchers from the University of the Western Cape said more work was needed to understand the reasons for the differences, pointing out that the study did not gather data on physical activity or diet - key lifestyle areas that tend to change when people move to a city.But they said hypertension was clearly linked with marital and employment status, as well as income.Lead researcher Bonaventure Egbujie said being a widow or widower increased the risk of hypertension and diabetes in both groups."People who have experienced marital loss have a significantly higher prevalence of cardiovascular disease risk factors than those who have never been married," he wrote in the SA Medical Journal.Cardiovascular diseases such as heart attacks and strokes are the leading cause of death globally...