What is the test used to determine the sufficiency of evidence in a medical malpractice case?

On appeal, we review the sufficiency of the evidence under the "substantial evidence" test. (People v. Johnson (1980) 26 Cal.3d 557, 576.) Under that test, we must view the entire record "'in a light most favorable to the respondent and presume in support of the judgment the existence of every fact the trier could reasonably deduce from the evidence,'" by considering whether there was substantial evidence to support the conclusion of the trier of fact. (Id. at pp. 576-577.) If the circumstances reasonably justify the jury's finding, we may not reverse simply because the circumstances might

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