Poor people in rich neighbourhoods have high death rates

Are people living in a high socioeconomic status neighborhood all well off? It turned out that when poor people living in a rich neighborhood, their risk of death increase. According to a study spanning 17 years, 1.9% of low socioeconomic status women who lived in wealthier neighborhoods had died of heart disease, compared with 1.1% of women from poorer neighborhoods. (the trend was the same in men, but less dramatic).
The reason? 1) cost of living in an rich neighborhood could leave poor people with little income to spend on health care and healthy food; 2) poor people get reminded every day that they're at the bottom of the social ladder. This psychological and social discrepancy have an negative effect on a person's health.