CTDs make up over 1/3 of all workers' compensation claims or 38% of all lost-time cases, according to the National Safety Council. Define a CTD. List five essential elements for cost containment, paying particular attention to sub-titles in bold font.. What are two reasons why an injured employee should see a physician trained in occupational medicine? What is the difference between a "physical" and "functional capacity testing"? In any companies' early return to work program, who should be the first on board