The aim of this study is to determine the various risk factors and stroke characteristics that play a role in
development of poststrokecongnitive impairment. A total of 119 chronic stroke patients were included in the
study. Patients with history of psychiatric, medical or taking drugs that cause cognitive impairement were
excluded from the study. The stroke patients were classified into normal or having mild, moderate and
severe congnitiveimpairement according to the mini-mental state examination. Demographic variables and
stroke risk factors including; age, sex, hypertension, diabetes mellitus, smoking, cardiac diseases, prior
history of stroke or transient ischemic attacks were assessed. Various stroke symptomatology, history of
delirium with the onset of stroke, and history of poststroke epilepsy were assessed.Barthel index and Beck
depression scale were used to assess the global poststroke disability and poststroke depression. The lesion
type, site, side, and size were assessed from the relevant brain imaging. The role of various previously
mentioned factors in development of poststroke cognitive impairement were tested using the appropriate
statistical test and C 4.5 decision tree for those factors were done.elderly stroke patients with multiple large
sized strokes especially in the left hemisphere, those with cortical lesion, those associated with delirious
onset, those who develop poststroke epilepsy and/or depression, and finally those patients with severe
poststrokediseability are more likely to suffer psotstroke cognitive impairement.Early cognitive rehabilition
methods and medical treatment with antidementia medications should be provided for patients with the
associated previously mentioned factors.