3) Balas. C. Michele, Happ. B. Beth, Yang. Wei et al: Outcomes associated with delirium in older patients in surgical ICUs, Chest, vol.135 (1), 18-25, 2009 4) Ban Thomas; Chronic disease and depression in the geriatric population, Journal of Clinical Psychiatry, vol.45, 18-23, 1984 5) Bjoro Karen, and Herr Keela; Assessment of pain in the nonverbal or cognitively impaired older adult, Clinics in Geriatric Medicine, vol.24, 237-262, 2008 6) Cole.G.Martin, Ciampi Antonio, Belzile Eric, and Zhong Lihong; Persistent delirium in older hospital patients: a systematic review of frequency and prognosis, Age and Ageing, vol.38, 19-26, 2009 7) Davies Sue, and Nolan Mike; 'Making it better': Selfperceived roles of family caregivers of older people living in care homes: A qualitative study, International Studies, vol.43, 281-291, 2006 Nursing 8) Ely. E, Gautam. S, Margolin. R et al: The impact of delirium in the intensive care unit on hospital length of stay 10) Lidell Evy; Family support - a burden to patient and caregiver, European Journal of Cardiovascular Nursing, vol.1, 149-152, 2002 11) Lin Feng, Vance. E. David, Gleason. E. Carely et al; Caring

for older adults with mild cognitive impairment, Journal of Gerontological Nursing, vol.38 (12), 23-35, 2012 12) Marik. E. Paul; Management of the critically ill geriatric patient, Critical Care Medicine, vol.34 (9), s176-181, 2006 13) Morioka Mizuho, Tanaka Makoto, Matsubayashi Kozo, and Kita Toru; Acceptance of memory impairment and satisfaction with life in patients with mild to moderate Altzheimer's disease, Geriatric and Gerontology International, vol.5, 122-126, 2005 16) Pisani. A. Margaret; Considerations in caring for the critically ill older patient, Journal of Intensive Care Medicine, vol.24 (2), 83-95, 2009 17) Tate. A. Judith, Sereika Susan, Divirgilio Dana et al; Symptom communication during critical illness, Journal of Gerontological Nursing, vol.39 (8), 29-38, 2013