en Behavioral Neuroscience Behavioral Neuroscience Original Original <p><b>Introduction:</b> Mild cognitive impairment can be considered as an intermediate clinical state between normal cognitive aging and mild dementia. Elderly people with this impairment represent an at-risk group for the development of dementia. The aim of this study was to investigate the prevalence of cognitive impairment in community-dwelling older adults by Mini-Mental State Examination (MMSE) and its relationship with socio-demographic variables. </p> <div><b>Methods:</b> In this analytical-descriptive study, 212 subjects admitted to Hamadan’s day care centers were selected through simple random sampling method. To gather the data, MMSE was used as well as a questionnaire containing demographic variables. Data analysis was completed through SPSS-16.  <div><b>Results:</b> The sample consisted of 17.9% male, 59.4% of whom were married. According to the results, 96 cases (45.3%) suffered from mild (MMSE&ge22), 110 cases (51.9%) from moderate (11&leMMSE&le21) and 6 cases (2.8%) from severe cognitive disorder (MMSE&le10). As findings revealed, factors such as age (Pv = 0.005, r = -0.491) and schooling (Pv < 0.001) are of significant relationship with MMSE score.</div> <div><b>Discussion:</b> Prevalence of cognitive decline in community-dwelling older adults was of normal range. Hence, familial relations and social support can decrease mental status disorder.</div> </div> Elders, Cognitive Impairment, Community-Dwelling 28 30 http://bcn.iums.ac.ir/browse.php?a_code=A-10-1-192&slc_lang=en&sid=1 Vahid Rashedi 1370031947532846006426 1370031947532846006426 Yes Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Mohammad Rezaei 1370031947532846006427 1370031947532846006427 No Faculty of Rehabilitation Sciences, Hamadan University of Medical Sciences & Health Services, Hamadan, Iran. Masoud Gharib 1370031947532846006428 1370031947532846006428 No Pediatric Neurorehabilitation Research Center, University of Social Welfare & Rehabilitation Sciences, Tehran, Iran.