Companies that track employee time off and other worker issues say sick-day use among those who aren't sick is on the rise.
From 2006 to 2010, the Workforce Institute at Kronos, a human resources policy group, found an 18% increase among workers who admitted to taking a sick day when they weren't really sick. And a 2007 survey by human resources consultant CCH found that two-thirds of U.S. employees who call in sick at the last minute actually weren't.