John von Radowitz

A clear link between wealth and health has been highlighted in a study of middle-aged Americans.

Being better-off was associated with a significantly lower risk of stroke between the ages of 50 and 64. Other findings linked a lack of wealth with higher blood pressure, excessive weight, diabetes and heart disease.

Scientists analysed data from 19,445 men and women involved in in the University of Michigan Health and Retirement Study which surveys people aged 50 and over every two years.

Over an average period of eight-and-a-half years, a total of 1542 of the participants suffered a stroke.

The researchers divided the participants' wealth levels into six categories. They found that the 10% at the bottom of the wealth ladder had three times more stroke risk between the ages of 50 and 64 than those at the top, excluding the "ultra-rich".

However ,after the age of 65 there was no difference in stroke risk between the two groups.

Dr Mauricio Avendando, from the Erasmus Medical Centre in Rotterdam, the Netherlands, who co-led the research, said: "Lack of material resources themselves, and particularly wealth, appear to strongly influence people's chances to have a first stroke."