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Randomised controlled trial.
4 intensive care units of 3 urban university teaching hospitals in midwestern USA.
54 adults (age range 18–89 y, mean age 57 y, 92% white, 59% women) who were in the intensive care unit and needed mechanical ventilation. Inclusion criteria were being alert and mentally competent, having adequate hearing, speaking English as the primary language, and not receiving continuous intravenous sedation. Follow up was 91%.
All patients were provided with a restful atmosphere for 30 minutes: blinds were closed, lights were dimmed, a “do not …
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