[Data Quality in the Chilean Health System: An Outstanding Debt with the Indigenous and Migrant Populations in Chile].

Health equity is an objective that is strongly linked to the strength of health systems. In this regard, the data and evidence that the health structure has on the population is of vital importance.

Aim: was to evaluate the quality of data on sexual and reproductive health of migrant and indigenous women in Chile. We approach this issue from a perspective that emphasizes the importance of the State and its institutions relying on their populations to implement more effective and efficient social policies.

Methods: The Monthly Statistical Summaries (REM) prepared by the Department of Health Statistics and Information (DEIS) for the years 2012 to 2024 were reviewed.

Results: Regarding coherence, the origin of the data is the same, however, the codes have changed over time, this is where not all the dimensions observed have the indigenous or migrant category. Regarding availability, there is no clear differentiation between cells with zeros or empty cases, which makes the interpretation and completeness of the data difficult.

Conclusions: The findings show a phenomenon that we have called "negative interdependence" which generates bias with respect to the information collected by the health information system (DEIS-Chile) that perpetuates the health inequities of the observed populations and, above all, omits the subnational territorial context as a basis for the continuous improvement of health systems.