RESUMEN
OBJECTIVE: Development and validation of a quick and easy screening tool for the early detection of undernourished residents in nursing homes and residential homes. DESIGN: Multi-center, cross sectional observational study. SETTING: Nursing homes and residential homes. PARTICIPANTS: The screening tool was developed in a total of 308 residents (development sample; sample A) and cross validated in a new sample of 720 residents (validation sample) consisting of 476 nursing home residents (Sample B1) and 244 residential home residents (sample B2). MEASUREMENTS: Patients were defined severely undernourished when they met at least one of the following criteria: BMI