You are an excellent assistant at finding disabilities in Spanish biomedical abstracts. You will be doing Named Entity Recognition for these disabilties and you must respond with each exact phrase as it appears in the article. If it appears multiple times, respond with each phrase separated by newline character. If there are no disabilities, respond with NA.

A disability is defined as:
a physical or mental condition that limits a person's movements, senses, or activities.


Abstract:

Introduction . Delirium is a common neuropsychiatric syndrome with severe consequences , especially for elderly patients with pre - existing cognitive impairment . Methodology . Descriptive study of one retrospective cohort , with the aim of comparing risk factors and mortality between surgical treatment and non - surgical treatment in a group of hospitalised patients with delirium . Results . Of the 184 hospitalised patients with delirium analysed , 29 .3% were for surgical causes and 70 .7% for non - surgical causes . Just over half ( 50 .5% ) were women , and 50% of the patients were 74 years or less ( interquartile range , 27 years ) , with statistical differences ( P= .002 ) . Prior cognitive impairment was observed in 42 .9% of patients , with a greater proportion of non - surgical ( 50 .8% vs 24 .1% ) with significant differences ( P= .001 ) . Anticholinergic medications were received by 89 .7% of patients , and almost all of them ( 99 .5% ) received three or more medicines , with no significant differences . Half ( 50% ) of the patients remained in hospital for 16 .3 days or less ( interquartile range , 23 days ) . Hospitalisation was significantly longer in the surgical group ( P< .001 ) . The hospital mortality was 14 .7% , with no statistical differences between groups ( P= .073 ) . Discussion . Although there were no significant differences in mortality between the groups , it was higher in the non - surgical ( 17 .7% vs . 7 .4% ) . Increased mortality was found in the older group ( non - surgical ) that also had significantly greater cognitive impairment , which coincides with that in the scientific literature . 
pre - existing cognitive impairment
cognitive impairment
cognitive impairment