Factors associated with the utilization of diagnostic tools among countries with different income levels during the COVID-19 pandemic.

Background: Disparities in the utilization of essential medical products are a key factor contributing to inequality in health outcomes. We aimed to analyze the trends and influencing factors in using Coronavirus disease 2019 (COVID-19) diagnostic tools and disparities in countries with different income levels.

Methods: We conducted a cross-sectional study using open and publicly available data sources.