Nineteen percent of employees call in “sick” when they actually just want to catch up on sleep, according to a CareerBuilder study. The national survey was conducted online by Harris Interactive from August 13 to September 6, 2013 and included a representative sample of 3,484 workers and 2,099 hiring managers and human resource professionals across industries and company sizes. Apart from actual illness, the other four most common reasons employees call in sick are: they just don’t feel like going to work (33%) or because they needed to relax (28%), they have a scheduled doctor’s appointment (24%), or they want the time to run personal errands (14%).