According to a new study office workers who spend long hours on the job are more likely to have high blood pressure including a type that can go undetected during routine medical check-ups. The study was published in the journal Hypertension. High blood pressure affects nearly half of Americans ages 18 and older and is a primary factor in more than 82000 deaths per year. Approximately 15-30 per cent of U.S. adults have a type of condition called masked hypertension meaning their high blood pressure readings are normal during health care visits but elevated when measured elsewhere. The new study