 The burden of chronic NCDs including mental health conditions is felt in workplaces around the world, notably due to elevated levels of absenteeism, or absence from work because of illness, and presenteeism, or productivity lost from staff coming to work and performing below normal standards due to poor health.For example, the United Kingdom experienced a loss of about 175 million days in 2006 to absence from illness among a working population of 37.7 million people.The estimated cost of absences due to illness was over 20 billion pounds in the same year.