title: Persistent vegetative state and dementia in the elderly.
abstract: BACKGROUND
  Very few studies have approached the issue of persistent vegetative state (PVS) within the elderly population. This study aims to assess the prevalence, determinants and prognosis of elderly patients with PVS admitted to a long-term geriatric facility.
  
  
  METHODS
  We conducted a cohort study in the setting of a Skilled Geriatric Nursing Department. All patients admitted during a 17-month period (N = 88) were included and tested for a diagnosis of PVS according to the Disability Rating Scale (DRS).
  
  
  RESULTS
  A clinical diagnosis of PVS was given to 15% of patients upon admission, whereas the DRS diagnosed 30.5% of patients as having PVS. During the study period, 12 out of 31 patients with PVS died, with a median survival of 127 days (range: 1-517 days).
  
  
  CONCLUSIONS
  Our study suggests that PVS is an advanced stage in the natural history of dementia in the elderly. The low proportion of patients with PVS recognized as having this disorder upon admission suggests a low awareness among hospital personnel. Further studies of the prevalence and determinants of PVS in the severely disabled elderly population are warranted.
authors.affiliation: Skilled Geriatric Nursing Department, Herzog Hospital, Jerusalem, Israel. jaul@zahav.net.il
authors.forename: Efraim
authors.initials: E
authors.lastname: Jaul
authors.forename: Ronit
authors.initials: R
authors.lastname: Calderon-Margalit
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D003704:Dementia / Q000175:diagnosis / Q000453:epidemiology* / Q000401:mortality; D004185:Disability Evaluation; D005260:Female; D005500:Follow-Up Studies; D015600:Glasgow Coma Scale; D006801:Humans; D007557:Israel; D008297:Male; D008875:Middle Aged; D010343:Patient Admission / Q000706:statistics & numerical data; D018458:Persistent Vegetative State / Q000175:diagnosis / Q000453:epidemiology* / Q000401:mortality; D011379:Prognosis; D012866:Skilled Nursing Facilities / Q000706:statistics & numerical data; D016019:Survival Analysis