Background
Ronald L. Hayes sought workers’ compensation benefits for an adjustment disorder with depressed features, asserting that a 2023 workplace incident while he was driving a bus for TriMet was the major contributing cause of the disorder. The Workers’ Compensation Board upheld TriMet’s denial of the claim.
Psychologist Dr. Wicher initially attributed 60 percent of the disorder’s cause to the workplace incident and 40 percent to preexisting personality features. After reviewing Hayes’s complete medical records—including a history of depressive reactions and major depressive disorder dating to 2010 and a 2014 suicide attempt—she revised her opinion and concluded that Hayes’s preexisting personality features, insufficient coping skills, and related factors were the major contributing cause. No other expert offered an opinion that the workplace incident was the major contributing cause.
The Court’s Holding
The Oregon Court of Appeals affirmed. It held that the board correctly applied ORS 656.802, under which Hayes had to prove by clear and convincing evidence that his adjustment disorder arose out of and in the course of employment, including that employment conditions were its major contributing cause.
The court concluded that substantial evidence supported the board’s determination that Hayes failed to meet that burden. The board was permitted to credit Wicher’s revised opinion and was not required to independently find that the work event was the major contributing cause, particularly when no expert opinion supported Hayes’s position. The board also supplied substantial reason by rationally connecting its factual findings to its legal conclusion.
Key Takeaways
- A claimant seeking compensation for a mental disorder must prove by clear and convincing evidence that employment conditions were the disorder’s major contributing cause.
- The Workers’ Compensation Board may credit an expert’s revised opinion when the revision follows review of additional medical history.
- Without supporting expert evidence, Hayes could not compel the board to find that the workplace incident was the major contributing cause of his adjustment disorder.
Why It Matters
The decision underscores the importance of persuasive medical evidence in Oregon mental-disorder claims, especially where the claimant has a significant preexisting mental-health history. It also illustrates the deferential substantial-evidence review applied to the board’s evaluation of expert testimony.
The opinion is a nonprecedential memorandum opinion under ORAP 10.30 and may not be cited except as permitted by ORAP 10.30(1).