The Failure of Plate Diagrams in Estimating Individualized Offered Portion Size: An enable Study

Plate diagrams (PDs) are commonly used to monitor dietary intake in nursing homes (NHs). PD intake estimation of texture-modified diet (TMD) is reliable, but only if the offered portion is determined by weighing records (WRs). Offered portion size is usually individualized in NHs and WRs are impractical for NH routine. Thus, an estimation of offered portion size by PDs seems to be appropriate but its validity is unknown. Further, validity of PDs for intake estimation based on estimated offer (instead of WRs) is unknown.