Significant differences were found in the degree of dementia, age, body weight, GNRI, CONUT, body weight, body mass index, hospitalization day, maximum body temperature, oxygen saturation level in room air, oxygen flow rate after hospitalization, serum urea nitrogen value, serum creatinine value, serum sodium value, serum albumin value, serum cholinesterase value, and presence or absence of past stroke. This evidence concerns the gene BCHE and Stroke.