Examining the COVID-19 impact on cancer surgery in Ireland using three national data sources.

Background: The healthcare system in Ireland was profoundly affected by COVID-19. This study aimed to explore the impact of the pandemic on cancer surgery in Ireland, from 2019 to 2022 using three national health data sources.

Methods: A repeated cross-sectional study design was used and included: (i) cancer resections from the National Histopathology Quality Improvement (NHQI) Programmes; (ii) cancer surgery from the National Cancer Registry Ireland (NCRI), and (iii) cancer surgery from Hospital Inpatient Enquiry (HIPE) System. Cancer surgery was presented by invasive/in situ and invasive only cancers (NCRI & HIPE), and by four main cancer types (breast, lung, colorectal & melanoma for NCRI & HIPE data only).

Results: The annual number of cancer resections (NHQI) declined by 4.4% in 2020 but increased by 4% in 2021 compared with 2019. NCRI data indicated invasive/in-situ cancer surgery for the four main cancer types declined by 14% in 2020 and 5.1% in 2021, and by 12.3% and 7.3% for invasive cancer only, compared to 2019. Within HIPE for the same tumour types, invasive/in situ cancer surgery declined by 21.9% in 2020 and 9.9% in 2021 and by 20.8% and 9.6% for invasive cancer only. NHQI and HIPE data indicated an increase in the number of cancer surgeries performed in 2022.

Conclusions: Cancer surgery declined in the initial pandemic waves suggests mitigation measures for cancer surgery, including utilising private hospitals for public patients, reduced the adverse impact on cancer surgery.