A multi-center, cluster randomized controlled study comparing usual care and a multidisciplinary intervention such as the DELirium Team Approach program to manage delirium among hospitalized cancer patients

INTERVENTION: Implementation of the DELTA program with six components: (1) education of health care providers, (2) screening of delirium, (3) planning for delirium care, (4) prevention of occurrence and worsening of delirium, (5) scheduled assessment of delirium symptoms or risk factors, and (6) management and treatment of delirium. Usual care CONDITION: Malignacy PRIMARY OUTCOME: The incidence in events in medical safety such as falls, self‐removal of drip infusion or drain tube, restraint SECONDARY OUTCOME: Falls, Self‐removal of drip infusion or drain tube, Restraint, Barthel Index, Level of nursing care needs, Antipsychotic drug use, Opioid use, Duration of hospital stay, Cost of medical care, Hospital readmission within 1 month after discharge, Mortality within 1 year after discharge INCLUSION CRITERIA: (1) Diagnosis of cancer at the primary site in health insurance claims (2) Age >= 50 (3) Hospitalized patients in eligible wards (4) Expected to live for more than 1 month (5) Ability to communicate and write in Japanese (6) Obtained informed consent from the patient or legally acceptable representative