Índice Relativo de Capacidade Intrínseca: uma nova abordagem fundamentada em Ciência de Dados e inspirada no Índice de Integridade Biótica

Abstract

Intrinsic Capacity (IC) has been widely studied; however, there are still disagree- ments regarding the construction of an indicator that fairly represents aspects of human health across the various socioeconomic contexts observed in patients around the world. Therefore, this study proposes an index model adapted to sociodemographic and econo- mic segments, inspired by the Index of Biotic Integrity (IBI). The methodology developed aims to assess the health of older adults in different groupingssuch as gender, ethnicity, and region by comparing them with so-called Reference Individuals (RI), defined in this study using statistical measures such as maximum, mean, and median. The application of the developed model resulted in the Relative Intrinsic Capacity Index (RICI), which expresses an individual’s value relative to the RI as a percentage. In the final analysis, the relationship between RICIs and the results of the Functional Ability questionnaires was examined, corroborating that individuals with better performance in Basic Activities of Daily Living (BADL) exhibited higher RICIs. Moreover, a positive Spearman correlation of 91.62% was observed between maximum RICIs and Instrumental Activities of Daily Li- ving (IADL), and 85.94% between median RICIs and Advanced Activities of Daily Living (AADL), within certain subgroups of the dataset. These findings reinforce the positive association between higher RICIs and better performance in functional abilities.