Data Sources: Department of Health, European Centre for Disease Prevention and Control, UN.
Ireland supplies very limited weekly deaths data to Eurostat, which is not enough to perform a meaningful analysis of excess mortality.
Consequently the data we use is based upon quarterly deaths data from the Irish Central Statistics Office, spanning from 1960 to Q2-2022 (as of January 2023).
Comment on the available data and its limitations.
The data on excess deaths and vaccination has several limitations that one should be aware of when analysing the charts below. Unlike the data from Eurostat which is weekly, the data presented here is quarterly.
Additionally, the European CDPC data on vaccination for Ireland has different age groups from the ones available in the mortality data. This results in a slight mismatch when showing excess deaths versus vaccination rates for different age groups.
In the charts below, we show the excess deaths age groups compared to vaccinations administered, in the following way:
Excess Deaths Age Group
Vaccination Age Group
The dashboard below summarises the analysis of excess mortality for different age groups in Ireland. It allows individuals, researchers and institutions to visualise the data, and make their own conclusions based upon what they view. Users can browse the different age groups. Each interactive chart attempts to capture different aspects of the observed excess mortality during the Covid-19 pandemic years. All the data is downloadable and the original data sources, as well as methodologies to analyse the data, are provided. We will endeavour to update our servers as new data becomes available.
We show the analysis of excess mortality using the different methodologies described in our methodology papers. These papers illustrate the pitfalls and advantages of using the different calculation methods for excess mortality.
In summary, using method 1, excess deaths for 2020, 2021, and 2022 are computed by subtracting the N-year pre-pandemic average deaths (typically 3 to 5 years) from actual deaths in the Covid-19 pandemic years. This method is the one most widely used for estimating excess deaths, including by countries' statistical offices. However, this method has obvious pitfalls as the measurement of excess deaths is highly sensitive to the baseline for estimating "normal" deaths. By using a prior average of the number of deaths as a baseline, biases are easily introduced due to increasing or decreasing population over time. When the population is increasing, excess deaths are over-estimated while when populations are decreasing they tend to be under-estimated.
Method 2 solves some of these problems by computing changes in death rates relative to a given baseline and, as shown in our methodology papers, are much more reliable for estimating excess mortality.
Yearly Excess Deaths using methods 1, 2A and 2C
The chart below shows the actual deaths (or death rate) versus the projected estimates when using the different methodologies described in our methodology papers.
The user can select the calculation method and age group. 2022 deaths or deaths rates are annualised estimates using a linear model.
The chart below shows the excess mortality for 2020, 2021 and 2022 (either excess deaths or excess death rates) for a given age group. Please be aware that we matched the age groups as described in the data section above.
The plot allows the user to select the desired methodology and age group. 2022 deaths or deaths rates are annualised estimates using a linear model.
Excess Mortality. Age-group comparison.
The following chart shows the analysis of excess mortality for 2020, 2021 and 2022, for different age groups.
The user can specify the method for estimating excess mortality.
Please be aware that, European CDPC data on vaccination for Ireland has different age groups from the ones available in the mortality data, as mentioned before. We matched the age groups as described in the data section above.
Yearly excess mortality, from 2020 to 2022, for different age groups.
Comparison of excess mortality methods
The following chart allows the user to compare the different methods for estimating excess mortality for 2020, 2021 and 2022.
The user can specify the Age Group.