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. 2024 Apr 8;16(4):e57860. doi: 10.7759/cureus.57860

Figure 2. Excess mortality during the pandemic in 2020, 2021, and 2022 (upper) and crude cancer deaths in 2022 (lower) in each age group.

Figure 2

Excess age-specific mortality = (observed ASMR − predicted ASMR) / predicted ASMR * 100 (%). Predicted ASMRs based on the 2010-2019 period preceding the COVID-19 pandemic were calculated using logistic regression. The ⁑ symbol signifies >99% upper PI, * >95% upper PI, and †<95% lower PI. 2020, deficit mortality was observed in most age groups except for the 75–79 age group. However, mortality increased gradually in 2021 and more remarkably in 2022 in almost all age groups except for the 65–69 and 85+ age groups. In the 75–79 age group, excess mortality was 3.9% (95%CI: 2.6, 5.3) in 2020, 7.9% (95%CI: 6.4, 9.5) in 2021, and 9.5% (95%CI: 7.8, 11.4) in 2022, exceeding the 99% upper PIs. In the 80–84 age group, excess mortality was 2.9% (1.4, 4.5) in 2022, exceeding the 95% upper PI. No statistical significance was detected in the younger age groups, which had few deaths. The chart below shows that the number of deaths from all cancers was highest in the 80–84 age group.