Institutional case volumes of thyroidectomies in Brazil and the impact of the COVID-19 pandemic: insights from a national database.

Introduction: Providing widespread access to thyroidectomies while consolidating services in high-volume centers is a significant challenge in healthcare. In this context, from a national perspective, we aimed to analyze the impact of the COVID-19 pandemic on the institutional case volumes of thyroid surgery in Brazil.

Material and methods: We analyzed retrospective thyroidectomy data from the Department of Informatics of the Unified Health System (Datasus), stratifying institutions into low-volume, intermediate-volume, and high-volume centers (<10, 10-100, and >100 thyroidectomies/year, respectively). We assessed the differences in absolute numbers and percentages of thyroidectomies performed during the pandemic years (2020-2022) compared with the pre-pandemic year (2019). Differences in the proportion of institutions based on case volumes from 2019 to 2022 were assessed using Cochran's Q test.

Results and discussion: In 2019, 556 Brazilian institutions performed 15,331 thyroidectomies. Of these, 46.4% were categorized as low-volume, 48.4% as intermediate-volume, and 5.2% as high-volume institutions, accounting for 5.5%, 61.4%, and 33.1% of the thyroidectomies, respectively. Compared with 2019, the volume of thyroidectomies was lower by 41.2% in 2020, 37.0% in 2021, and 12.8% in 2022. When analyzing the proportions of institutions that maintained their pre-pandemic case volume in the first pandemic year, the intermediate and high-volume institutions experienced reductions of 34.9% (p < 0.001) and 58.6% (p < 0.001), respectively, while low-volume institutions presented a 4.3% reduction (p = 0.081).

Conclusion: The COVID-19 pandemic disrupted the landscape of thyroidectomies in Brazil, particularly affecting intermediate-volume and high-volume institutions, while low-volume institutions showed greater resilience.