In a decision with broad implications, the U.S. Court of Appeals for the D.C. Circuit has made it tougher for disabled workers to win suits against their employers under the Americans with Disabilities Act.

The ruling comes on the heels of a nationwide push by businesses to control the booming number of suits being filed under the landmark 1990 Disabilities Act. The Supreme Court last year riled disabilities advocates with a tough interpretation of the ADA that made it harder for workers to prevail.