What is the test for "relevant evidence" in a personal injury case?

A group of defendant's contentions present a broad claim that the trial court allowed into evidence numerous items of irrelevant testimony. We begin with the principles that except as otherwise provided by statute "all relevant evidence is admissible" (Evid. Code, 351); that "relevant evidence" is all evidence "including evidence relevant to the credibility of a witness or hearsay declarant, having any tendency in reason to prove or disprove any disputed fact that is of consequence to the determination of the action" (id., 210); and that the trial court is vested with wide discretion in determining relevance under this standard (People v. Warner (1969) 270 Cal.App.2d 900, 908, 76 Cal.Rptr. 160, and cases cited).