The design of the questionnaire was based mainly on the Registered Nurses Association of Ontario (2003) guidelines on delirium, dementia, and depression and also on the CCSMH (2006) guideline on delirium. In addition, nursing reference books elaborated certain points (Brien, 1997; Dujardin & Lemaire, 2008; Lemaire & Bherer, 2005; Voyer, 2006)