The appeal of employee wellness programs is that they keep workers healthy through prevention. Flu shots, on-site gyms, support groups and free health appraisals are all part of the offering. Yet a new study from Buck Consultants found that — even though U.S. companies spent about 35% more ($220) per employee enrolled in such programs in 2010 compared to 2009 — only 40% of them actually took steps to measure their programs' effectiveness. For many, the ROI is unknown.
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