Table 1.

The Demographics of the Study Population.

Study group	n= 290 patients
Age	Mean = 84 years
	SD = 6
	Range = 61–90 years
Sex	208 females (72%)
	82 males (28%)
Cognitive status measured by SPMSQ	140 patients (48%) were lucid
	150 patients (52%) with cognitive impairment
ASA class	130 patients (45%) with ASA 1–2
	160 patients (55%) with ASA 3–4

SD, standard deviation; SPMSQ, the short portable mental status questionnaire; ASA class, American Society of Anesthesiologists classification.