The use of psychotropics and survival in demented elderly individuals

Abstract

The present study aimed to examine the use of psychotropics and its relation to survival in demented elderly persons. A random sample of 700 individuals, aged 75 years or older, was drawn from the population of Kuopio city in January 1998. A geriatrician and a nurse carried out clinical examinations of 601 individuals, of whom 137 suffered from dementia according to DSM-IV criteria. The lifespan was calculated from the date of examination in 1998 to the end of 2003. In survival analyses, subjects were divided according to psychotropic use into groups: (i) users of only one of kind of psychotropics and (ii) concomitant users of all kinds of psychotropics. Psychotropics were classified into antipsychotics, antidepressants and a group of anxiolytics and hypnotics/sedatives. Seventy-one percent (n = 97) of demented elderly individuals used a psychotropic drug. Age- and sex-adjusted survival did not differ by severity of dementia (P = 0.076) or by the diagnosis of dementia (P = 0.54). When survival was compared with nonusers of psychotropics, the hazard ratio was 2.75 (P = 0.002) for individuals who used antipsychotics as their only psychotropic medicine and 1.76 (95% confidence interval 1.09-2.86) for concomitant users of all kinds of psychotropics. The use of several psychotropics or antipsychotics is a risk factor for death in demented elderly persons.