Geriatr Gerontol Int. 2025 Jul 21. doi: 10.1111/ggi.70124. Online ahead of print.ABSTRACTAIM: The availability of diverse assessment methods, based on different devices and conditions, for respiratory sarcopenia is crucial for developing community health initiatives. Thus, in this study, we aimed to compare the concordance in diagnosing respiratory sarcopenia based on the maximal respiratory pressure (MRP) and peak expiratory flow rate (PEFR), which are specific indicators of respiratory-muscle strength, in a community-dwelling older adult population.METHODS: In the Otassha Study conducted in 2023, 499 community-dwelling adults aged >65 years in Itabashi Ward (184 men and 315 women) were evaluated for MRP, PEFR, walking speed, grip strength, and appendicular skeletal muscle mass (ASM). We determined two respiratory-sarcopenia models using low skeletal muscle mass and low MRP/PEFR (both