1. Wai Wong Wai Wong Australia says:

    POCD (postoperative cognitive dysfunction) is a recognized clinical phenomenon. According to a study, about 40% of all persons over age 60 who are hospitalized for surgery have POCD on discharge, and about 10% have POCD three months later.

    A point also worth mentioning is that anesthetic drugs play a role in the former figure (short term POCD), and in my opinion are likely to have affected the ICU patients as well.

    Ref: www.ncbi.nlm.nih.gov/pmc/articles/PMC3959222/

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