South Coast Framing v. Workers' Comp. Appeals Bd. (Clark) (2015) 61 Cal.4th 291
The employee bears the burden of proving injury AOE/COE by a preponderance of the evidence.
Applicant must show industrial causation is reasonably probable, not zero.
From the decision · page 16The employee bears the burden of proving injury AOE/COE by a preponderance of the evidence.
(South Coast Framing v. Workers' Comp. Appeals Bd. (Clark) (2015) 61 Cal.4th 291, 297-298,
302 [80 Cal.Comp.Cases 489]; Lab. Code, § 3600(a); 3202.5.) The Supreme Court of California
has long held that an employee need only show that the "proof of industrial causation is reasonably
probable." (McAllister v. Workmen's Comp. Appeals Bd. (1968) 69 Cal.2d 408, 413 [33
Cal.Comp.Cases 660]) Applicant must only show that industrial causation was "not zero" to show
sufficient contribution from work exposure. (Clark, supra, 61 Cal.4th at p. 303.) Decisions of the
Appeals Board must be supported by substantial evidence. (Lab. Code, § 5903, 5952(d); Lamb
v. Workmen's Comp. Appeals Bd. (1974) 11 Cal.3d 274 [39 Cal.Comp.Cases 310]; Garza v.
Workmen's Comp. Appeals Bd. (1970) 3 Cal.3d 312 [35 Cal.Comp.Cases 500]; LeVesque v.
Escobedo v. Marshalls (2005) 70 Cal.Comp.Cases 604 (Appeals Board en banc)
Medical opinion must be framed in terms of reasonable medical probability, not speculative, based on pertinent facts and adequate examination and history, with reasoning in support of conclusions.
Medical reports and opinions are not substantial evidence if erroneous, speculative, or based on inadequate histories or incorrect legal theories.
From the decision · page 17Workmen's Comp. Appeals Bd. (1970) 1 Cal.3d 627 [35 Cal.Comp.Cases 16].) To constitute
substantial evidence `...a medical opinion must be framed in terms of reasonable medical
probability, it must not be speculative, it must be based on pertinent facts and on an adequate
examination and history, and it must set forth reasoning in support of its conclusions." (Escobedo
v. Marshalls (2005) 70 Cal.Comp.Cases 604, 621 (Appeals Board en banc).) "Medical reports and
opinions are not substantial evidence if they are known to be erroneous, or if they are based on
facts no longer germane, on inadequate medical histories and examinations, or on incorrect legal
theories. Medical opinion also fails to support Board's findings if it is based on surmise,
speculation, conjecture or guess." (Hegglin v. Workmen's Comp. Appeals Bd. (1971) 4 Cal.3d,
162, 169 [36 Cal.Comp.Cases 93].)