"delirium predominance in the intensive care unit (ICU) is 20- 80%, depending on the scale to which it measures itself and some characteristics of the patients ( Carrillo & Sosa, 2010). The development of the delirium in the intensive care unit presents an important impact in the treatment of the patient , therefore directly influences the hospital cost , in the stay and the mortality .Martinez & others (2004) also , the delirium is diagnosed just in 66-84% of the patients who present this complication , because in come circumstances it is confused with dementia or anxiety and why there does not exist a diagnostic methodology adequate for its evaluation. With regard to the diagnosis of the delirium , several methods exist for the diagnosis , the evaluation method of the confusion CAMICU of the english confusion assesment method for the ICU is the most used, in the intensive care unit , for its high sensibility, reliability and validity to identify delirium when it is used by nurses and doctors of the ICU and only it needs 2-3 minutes for its achievement (Ely & others, 2004) This way, Boogaard and collaborators decided to construct and validate a model who allows to predict the delirium probability in adult patients of intensive care unit (Boogaard