Giving Compass' Take:

• A recent study from University of Chicago and Harvard found that employee wellness programs do not have a large impact on how much employees spend on health care or absenteeism.

• How can employers move forward with this new information and tailor employee wellness programs?

• Read more about the importance of a flexible corporate wellness program.

Workplace wellness programs have become an $8 billion industry in the U.S. But a study published Tuesday in JAMA found they don’t cut costs for employers, reduce absenteeism or improve workers’ health.

Most large employers offer some type of wellness program — with growth fueled by incentives in the federal Affordable Care Act.

A host of studies over the years have provided conflicting results about how well they work, with some showing savings and health improvements while others say the efforts fall short.

Many studies, however, faced a number of limitations, such as failing to have a comparison group, or figuring out whether people who sign up for such wellness programs are somehow healthier or more motivated than those who do not.

Now researchers from the University of Chicago and Harvard may have overcome these obstacles with one of the first large-scale studies that is peer-reviewed and employs a more sophisticated trial design.

They randomly assigned 20 BJ’s Wholesale Club outlets to offer a wellness program to all employees, then compared results with 140 stores that did not.

After 18 months, it turned out that yes, workers participating in the wellness programs self-reported healthier behavior, such as exercising more or managing their weight better than those not enrolled.

But the efforts did not result in differences in health measures, such as improved blood sugar or glucose levels; how much employers spent on health care; or how often employees missed work, their job performance or how long they stuck around in their jobs.

Read the full article about workplace wellness by Julie Appleby at Governing Magazine.