Cognitive impairment has been associated with several diseases and organic
disturbances but few studies have explored the relationship between renal
function and cognition.OBJECTIVEThe aim of this study was to compare the renal function of elderly patients
with and without Alzheimer's disease, and to identify potential associated
comorbidities, as well as the presence of microalbuminuria.METHODSA group of 60 patients with dementia syndrome and probable Alzheimer's
disease, and 20 patients without dementias, followed at the Geriatric
outpatient unit of the Santa Casa de São Paulo Hospital, were
selected for this study.RESULTSThe results showed that the groups studied differed in terms of age, gender
and Mini-Mental State Exam score, but no statistical difference was found
for the presence of comorbidities (diabetes mellitus, dyslipidemia and
systemic arterial hypertension). A significant difference in estimated
creatinine clearance was observed between the two groups, with the
Alzheimer's disease patients presenting significantly lower values than
control subjects. Similarly, analysis of a portion of the two groups for the
presence of microalbuminuria revealed a statistically significant difference
between the two groups.CONCLUSIONThe study conclusions were that patients with Alzheimer's disease had lower
glomerular filtration and a higher incidence of microalbuminuria, yet
without having more classic risk factors for Alzheimer's disease such as
systemic arterial hypertension, diabetes mellitus or dyslipidemia.