I did some analysis of deaths over this pandemic (because I’m morbid like that).
I calculated expected “normal” deaths for every week of 2020, based on 10-year-average age-specific death rates for each specific week of the year applied to the most recent age-specific populations. I also calculated an upper and lower significance threshold as twice the standard deviation. The graphs below compare these with the actual deaths from all causes (so far), in different age groups.
During the first wave of the coronavirus pandemic, excess deaths (defined by me in relation to expected deaths as calculated above) reached 0.98 of a month’s worth of extra deaths in England and Wales. The tally has since come down to 0.86 of a month for 2020 so far, as deaths have been a little lower than expected after the peak. In Scotland, the excess reached 0.57 of a month, and has since come down to 0.47 of a month’s worth.
The recent lower-than-expected death rates seem to indicate that the deaths of some very old or unwell people were brought forward just a little by COVID-19. Certainly it’s in the older populations that the recent death rates are low enough to reach significance.
Conversely, deaths in the 0-44 age range barely reached significant elevation during the peak. In Scotland, the death rate in that age group has not really come down since April and is still skirting significance. This can’t be due to the coronavirus directly but may be due to effects of the lockdown including reduced access to health services. NRS report that a good chunk of the excess deaths over this year were due to causes other than COVID-19, including dementia, genitourinary diseases and diabetes.
If anyone reading this can help me with data for other countries, I’d love to expand the above analysis.
(Apologies, the y-axis label in each graph should just read “Deaths”, not “Deaths or cases”.)