Tuesday, March 31, 2020

CDC data. Total Deaths in the US. What did you expect?

In the midst of the Corona Virus nationwide shutdown with social distancing it may help to look at some data which may give a different impression than we have previously thought.


The CDC tracks total deaths in the US and also separately reports the Pneumonia and Influenza deaths and as a percentage of total deaths.  The link is: https://www.cdc.gov/flu/weekly/#S2
The graphic highlights the impact of a severe flu season as happened in the beginning of 2018. 

The raw data is even more informative.
With a country of 350 million, I would expect at least 3.5 million deaths per year. In fact recently all cause deaths have been around 2.8 million people per year.  This works out to about 54000 deaths per week on the average. A new pandemic disease should have a noticeable affect on these numbers as was seen for the severe flu in early 2018 when deaths per week reached 67495 at its peak.

The CDC data reported at the 'view chart data' link gives total deaths each week since 2013
Interestingly, data for the weeks 3 to 11  of 2020 show FEWER deaths per week in 2020 than any year since 2016. One might expect social distancing and other recent social changes to impact deaths from other causes as well which might show up in the overall death statistics. For the first 9 weeks of this year (2020), there are more than 2500 fewer deaths per week on average compared to the year before. For the most recent two weeks reported the differences are 10000 and 20000 fewer deaths per week. (I'm willing to wait on the possibility of incomplete reports but the CDC data already waits a full 2 weeks before reporting their initial numbers.)

I would be interested in a breakdown of all causes to see where this significant change is coming from.  Perhaps fewer traffic fatalities? fewer deaths during elective surgery? All sorts of possibilities beyond the impact on infectious disease transmission.

Raw numbers:

CDC  All cause mortality in the US
Year 2015 2016 2017 2018 2019 2020 difference
Week from 2019
1 61737 55788 59763 66134 58287 58822 -535
2 61141 55525 60980 67495 58350 58670 -320
3 58628 55182 59293 64647 58193 56942 1251
4 57269 55606 58047 62780 57831 56111 1720
5 57284 54896 58432 60974 58122 54926 3196
6 56420 55106 59038 61110 58489 55054 3435
7 56348 55785 58479 59779 57915 53647 4268
8 55668 54873 58288 57793 57856 52985 4871
9 55732 55875 57256 56692 57914 51721 6193
10 55272 56112 57477 57093 58487 47917 10570
11 54262 54462 56656 56326 57869 37641 20228
data as of 14 Mar 2020 as reported on 26 Mar 2020
https://www.cdc.gov/flu/weekly/#S2

Something to think about.






What do you think?