381 P.3d 1006
Or. Ct. App.2016Background
- Claimant slipped/tripped in her employer‑leased building lobby while walking to work and fractured her shoulder; employer denied workers’ compensation claim.
- ALJ found claimant had eliminated idiopathic causes (medical/personal risks) but denied claim on separate ground that the lobby was not under employer control (not in course of employment).
- Board reversed on different ground: concluded claimant failed to "persuasively eliminate" idiopathic causes (e.g., diabetes, obesity, ankle weakness, antihypertensive meds), so injury was not an "unexplained fall" arising from employment.
- Employer’s expert (Dr. Bell) opined idiopathic causes were "at least equally possible"; claimant’s physician (Dr. Kelly) said idiopathic factors had only "potential" to contribute but could not be excluded.
- Appellate court reviewed for substantial evidence/legal error and held the board applied an incorrect legal standard by effectively requiring claimant to disprove all possible idiopathic causes; vacated and remanded.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether claimant persuasively eliminated idiopathic causes so an unexplained fall may be deemed to arise out of employment | Claimant: medical evidence shows only general potential idiopathic risks; she proved idiopathic causes were less than equally likely than her tripping explanation | Employer: board reasonably relied on experts that idiopathic causes were possible/equally possible; appellate court should defer | Held: Board imposed too stringent standard (requiring exclusion of all possible idiopathic causes). Claimant need only show idiopathic causes were less than equally likely; vacated and remanded. |
Key Cases Cited
- Luton v. Willamette Valley Rehabilitation Center, 272 Or. App. 487 (2015) (standard of review for board orders)
- Blank v. U.S. Bank of Oregon, 252 Or. App. 553 (2012) (explained scope of "truly unexplained" fall and burden to eliminate idiopathic causes)
- SAIF v. Uptegrove, 226 Or. App. 45 (2009) (distinguishing "course of" and "arising out of" employment prongs)
- Phil A. Livesley Co. v. Russ, 296 Or. 25 (1983) (formulation of unexplained‑fall doctrine and elimination of idiopathic causes)
- McTaggart v. Time Warner Cable, 170 Or. App. 491 (2000) (eliminating other causes as a way to prove lack of explanation)
- McAdams v. SAIF, 66 Or. App. 415 (1984) (claimant fails where idiopathic and work causes are equally possible)
- Guill v. M. Squared Transportation, Inc., 277 Or. App. 318 (2016) (equally possible idiopathic causation defeats claim)
- SAIF v. Thompson, 360 Or. 155 (2016) (remand appropriate where board applied incorrect legal standard)
- Erck v. Brown Oldsmobile, 311 Or. 519 (1991) (deference to ALJ credibility/demeanor findings)