But high-income countries showed the highest levels of impairment from the disorder.

Although once considered a problem exclusive to high-income countries, cancer is a leading cause of death and disability in the developing world.

Health research is disproportionately focused on diseases of concern to high-income countries, the report said.

Thus, a high-income country may be classified as either developed or developing.

But in 2013, life expectancy was less than 17 other high-income countries.

Once considered a problem only of high-income countries, obesity rates are rising worldwide.

For income-elastic products and services, demand first arises in high-income countries.

Death rates in high-income countries are also very low among children and younger women, where most deaths occur after the age of 60 years.

The issue of market access to high-income countries is a thorny but crucial one.

It is already rated a high-income country by the World Bank.