A validation study the Iranian Modified Barthel Index (MBI) in hospitalized acute stroke elderly by classical test theory approach and investigate Rasch analysis for both Iranian version MBI and BI and compare the hierarchical item difficulty of them. Face-to-face interview with 100 geriatric stroke inpatients 60+ or their caregivers was done in a cross-sectional study. First, construct validity of MBI analyzed by the classical test theory, then Rasch analysis were done for BI and MBI. The reliability of the Iranian MBI was significant at 0.955. One factor achieved by the variance of 83.2%. In Rasch analysis for MBI, the most difficult item was stair climbing, whereas the simplest items were bowel and bladder control. In BI, the most difficult items were toilet use and ambulation. The Iranian MBI is very accurate and reliable; therefore the use of MBI to measure better outcomes in stroke elderly inpatients is recommended comparing with BI.

通过经典测试理论方法对住院急性卒中老年人的伊朗改良 Barthel 指数 (MBI) 进行验证研究，并调查伊朗版 MBI 和 BI 的 Rasch 分析，并比较它们的分层项目难度。在一项横断面研究中对 100 名 60 岁以上的老年卒中住院患者或其护理人员进行了面对面访谈。首先用经典检验理论分析MBI的结构效度，然后对BI和MBI进行Rasch分析。伊朗 MBI 的可靠性显着为 0.955。一个因素实现了 83.2% 的方差。在 MBI 的 Rasch 分析中，最困难的项目是爬楼梯，而最简单的项目是肠道和膀胱控制。在 BI 中，最困难的项目是如厕和走动。伊朗MBI非常准确可靠；