Similarly, a significantly lower delirium severity score was found for cases classified as "no acute encephalopathy" but "delirium", compared to a positive classification by both expert panels. Studies on delirium detection tools usually have a delirium expert as a reference rater. Interestingly, if "acute encephalopathy" was present without clinical delirium, a significantly higher severity of delirium score (DRS-R-98) was observed, compared to a negative classification by both expert panels. [Extracted from the article]