High absenteeism in the workplace may be indicative of poor morale, but absences can also be caused by workplace hazards or sick building syndrome. Measurements such as the Bradford factor, a measurement tool to analyze absenteeism which believes short, unplanned absences effect the work group more than long term absences, do not distinguish between absence for genuine illness reasons and absence for non-illness related reasons. In 2013, the UK CIPD estimated that the average worker had 7.6 absent days per year and which cost employers £595 per employee annually. Measurement methods are not exact and all encompassing, resulting in skewed results depending on variables being observed. As a result, employees can feel obliged to come to work while ill, and transmit communicable diseases to their co-workers. This leads to even greater absenteeism and reduced productivity among other workers. View the latest trends in health-related workplace absenteeism in the United States.