en General پژوهشي Research Article Background: Pain is a common complaint of the elderly and it is important to evaluate pain intensity carefully in aged people. There are different self-report scales for pain evaluation in elderly individuals, however, only a few studies have compared these scales. This study was conducted to compare 2 regular pain scales: FPS-R and NRS in the elderly population. Methods: In this cross sectional study, we evaluated 2 different pain assessment tools. A total of 120 bedridden patients, who were older than 65 years, and were admitted in governmental hospitals in Hamadan-Iran were studied during 3 months (May-July 2016). For evaluating pain, we used the FPS-R (faces pain scale-revised) and NRS (numerical rating scale). All participants&#39; information were gathered in a checklist and analyzed using the SPSS 16 software. Results: All patients had some degree of pain that started from 1 month to over 6 months ago, among them, 115 (96%) had persistent pain. The mean pain intensity in the participants was similar with both scales. There was a strong correlation between the 2 scales when using the Pearson correlation method (r = 0.735, P < 0.001). The age group analysis showed a significant difference in different age subgroups, therefore, the 75 - 85 year old age group had the highest and > 85 years old had the lowest pain intensity (7.07 vs. 5.36, respectively using NRS, PV = 0.014) Conclusions: Pain has a remarkable prevalence in bedridden patients in Hamadan. Both scales: the FPS-R and NRS scales had a strong correlation for measuring pain intensity in the elderly patient population, however, simplicity of the FPS-R scale for use with the older adults, makes it an appropriate pain scale in clinical practice. Future studies need to evaluate a suitable management pain for older adults. Pain,FPS-R,NRS,Aged,Hospitalization,Iran 0 0 http://mcj.bums.ac.ir/browse.php?a_code=A-10-1-53&slc_lang=en&sid=1 Mohamad Ali Seif Rabiei 10031947532846003515 10031947532846003515 No MD, Associate Professor of Community Medicine, Department of Community Medicine, Hamadan University of Medical Sciences, Hamadan, IR Iran Mahshid Nikooseresht 10031947532846003516 10031947532846003516 No MD, Pain Fellowship, Associate Professor of Anesthesiology, Hamadan University of Medical Sciences, Hamadan, IR Iran Jalaleddin Amiri 10031947532846003517 10031947532846003517 No Assistant Professor, Deputy for Health, Department of Pediatrics, Hamadan University of Medical Science, Hamadan, IR Iran Zahra Sanaei 10031947532846003518 10031947532846003518 Yes Zahra Sanaei, Faculty of Medicine, Shahid Fahmide Bul. P.O.BOX: 6517838736. Tel: +98-8138380160; +98-9166620771, Fax: +98-8138380208, E-mail: zahrasanaei58@yahoo.com