en Clinical Neuroscience Clinical Neuroscience Original Original <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Tahoma;"><span style="line-height:2;"><span style="unicode-bidi:embed"><strong>Introduction</strong>: This study aimed to compare the diagnostic value of four questionnaires for the diagnosis of neurocognitive disorders (NCDs) in the elderly.<br> <strong>Methods</strong>: &nbsp;In this project, people older than 60 years who lived in Tehran were investigated. A total of 99 literate cases were enrolled in the study, and four questionnaires, including functional assessment staging tool (FAST), abbreviated mental test score (AMTS), mini-mental state examination (MMSE), and modified Persian test of elderly for assessment of cognition and executive function (PEACE) were completed for them. They were then referred to a neuropsychiatrist, and the status of their cognition and neurobehavior was determined. The specialists were blinded to the results of the tests.<br> <strong>Results</strong>: Of the 99 participants studied, 39 cases were healthy, eight cases had mild Alzheimer&rsquo;s disease, 38 had amnesic MCI, five cases had secondary dementia, and nine cases had mixed vascular dementia and Alzheimer&rsquo;s disease. The area under the ROC curve for distinguishing the healthy group from the rest of the population was 0.692, 0.629, 0.734, and 0.751 for the FAST, AMTS, MMSE, and NBCSS questionnaires, respectively.<br> <strong>Conclusion</strong>: MMSE and NBCSS tests had better diagnostic power than the other two tests to distinguish the healthy group from the rest of the population.</span></span></span></span> <h1 style="text-align:left; margin-top:16px; margin-bottom:4px"><span style="font-size:14pt"><span style="line-height:200%"><span style="unicode-bidi:embed"><span 2="" style="font-family:" titr=""><span style="font-size:12.0pt"><span style="line-height:200%"><span style="font-family:"Times New Roman","serif""></span></span></span></span></span></span></span></h1> </div> Alzheimer’s disease, Diagnosis, Mini-mental state examination, Abbreviated mental test score, Functional assessment staging tool 137 142 http://bcn.iums.ac.ir/browse.php?a_code=A-10-1745-1&slc_lang=en&sid=1 Fatemah Khamseh Fkhamseh1345@yahoo.com 13700319475328460044432 13700319475328460044432 No Iranian Association of Alzheimer’s Disease, Tehran, Iran. Gholamreza Hadjati rhadjati47@yahoo.com 13700319475328460044433 13700319475328460044433 Yes Iranian Association of Alzheimer’s Disease, Tehran, Iran. Hossein Nahvinejad hosseinnahvi@yahoo.com 13700319475328460044434 13700319475328460044434 No Iranian State Welfare Organization, Tehran, Iran. Zahra Nouparast z.noparast@gmail.com 13700319475328460044435 13700319475328460044435 No Iranian Association of Alzheimer’s Disease, Tehran, Iran. Masomeh Salehi Alzheimer.iran@yahoo.com 13700319475328460044436 13700319475328460044436 No Iranian Association of Alzheimer’s Disease, Tehran, Iran. Maryam Noroozian noroozianmaryam@yahoo.com 13700319475328460044437 13700319475328460044437 No Department of Neurology, Tehran University of Medical Sciences, Tehran, Iran. Mahshid Foroughan m_foroughan@yahoo.com 13700319475328460044438 13700319475328460044438 No Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Farshid Alaedini falaedini@yahoo.com 13700319475328460044439 13700319475328460044439 No Shafa Health Research Center, Tehran, Iran. Afrooz Saffarifard drasaffari@yahoo.com 13700319475328460044440 13700319475328460044440 No Iranian State Welfare Organization, Tehran, Iran. Faraneh Farin faranehk@yahoo.co.uk 13700319475328460044441 13700319475328460044441 No Iranian Association of Alzheimer’s Disease, Tehran, Iran. Mehrdad Khansari mdkhansari@yahoo.com 13700319475328460044442 13700319475328460044442 No Iranian Association of Alzheimer’s Disease, Tehran, Iran. Maryam Pourseid Mohammad Marypoury77@gmail.com 13700319475328460044443 13700319475328460044443 No Iranian State Welfare Organization, Tehran, Iran. Zahra Ahmadi Ahmadi.213@gmail.com 13700319475328460044444 13700319475328460044444 No Iranian State Welfare Organization, Tehran, Iran.