What is the standard of appellate review when a juror is excused for good cause?

9 A recent opinion issued by an appellate court in the Fourth District questions whether the appropriate standard of appellate review when a juror is excused for good cause should be an " 'independent appellate issue ... based upon the whole record' " and not merely a substantial evidence analysis. (See People v. Diaz (1984) 152 Cal.App.3d 926, 933-934, 200 Cal.Rptr. 77.) We need not address this question as it pertains to the excusal of a juror for illness because, under either standard, the trial court's action in the present case was clearly without error.