"There are multiple stressors: Humans are transitioning from a rural to an urban species, the world median age is increasing, and we live in increasingly urban environments with engineered structures that lead to the 'urban heat island.'".
Thailand is a developing middle-income tropical country with a predominantly rural population and a nominal per capita gross domestic product close to the world median (22, 23).
World median age was obtained from a previous Feigin et al 20 review, and was found to be older than for the recruited patients (world median is 75 years; recruited median is 73 years, with a 95% CI of 72 to 74).
Africa is far from this level with a health workforce density that only averages 0.8 worker per 1000 people, while the world median density of health personnel is 5 per 1000 people [ 5].
7 Although national health indicators such as life expectancy at birth (74 years) and under 5 mortality rate (14 deaths/1000 live-births) in Brazil are close to the world median values, 8 there are large regional variations: for example, the under 5 mortality rates in the North and North-east are twice those in the South and South-east.
The rise in demand for wheat is clearly going to continue: the median projection for world population is for it to rise from its current level of 7.20 billion to 9.55 billion by 2050 and 10.87 billion by 2100 (Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat, 2012).
As late as 1970, the world's median fertility level was 5.4 births per woman; in 2000, it was 2.9.
JAPAN has the oldest median age in the world, at nearly 43.
Nevertheless, new Census Bureau statistics show that New Jersey and Connecticut are indeed the most prosperous states in the most prosperous country in the world with median household incomes above $50,000.
It's a lot harder for them to do it in a world where median household income fell by more than 8% between 2007 and 2010.
Over the past 50 years, the median age of the world's population has increased by a mere three years, from 23.6 in 1950 to 26.4 in 2000.
