New Delhi: COVID-19 patients admitted to intensive care in the early months of the pandemic experienced a higher burden of delirium and coma than is typically found in those hospitalised with acute respiratory failure, according to the largest study of its kind to date.The research, published in The Lancet Respiratory Medicine journal, tracked the incidence of delirium and coma in over 2,000 COVID-19 patients admitted before April 28, 2020, to 69 adult intensive care units across 14 countries.According to the scientists, led by those at Vanderbilt University Medical Center in the US, the choice of sedative medications and curbs on family visitation played a role in increasing acute brain dysfunction for these patients.They said ICU delirium.