Sunday, May 24, 2020

Numbers

I haven't written much about the virus because 1) it's already being so widely covered I don't have much to add, 2) I don't have any special insight about it and 3) it's mostly depressing. (Of course, I've stopped writing about everything lately.) So this isn't really about the virus, it's more about the coverage, which is often surprisingly bad--presumably because many reporters don't understand numbers.

California has been doing fairly well, at least compared to many other high population states, especially in the northeast.  However, Los Angeles County is the worst hit section of California, with a quarter of the population yet half the cases.

Particularly frustrating is how often the numbers seem to be getting better only to get worse again.  In fact, this has happened so regularly there has to be some explanation--perhaps the release of official numbers are done differently by the authorities on the weekdays versus the weekend.

Unfortunately, the media coverage (at least what I read) is often all but useless in explaining any trends.  They dutifully report the latest numbers, but offer no context.  The two main numbers are new cases and deaths.  New cases requires interpretation--for instance, presumably, the more testing, the more new cases will be caught.  Deaths also require context, since, if nothing else, it's a lagging indicator.

But then we get headlines like this: "LA County Coronavirus Cases, Deaths Tick Upward..."

I thought they might be referring to a trend--more new cases than before, more deaths than before--but no, they simply mean the number of overall cases and deaths since we started counting has increased.  Well, that's how numbers work. Until new cases and fatalities go to zero, the overall numbers will keep going up.

Even with all the data it's hard to understand what's happening.  But when the stories are done without respect to trends, it's almost better to have no reporting than bad reporting.

2 Comments:

Anonymous Anonymous said...

Sigh. Press incompetence is a bottomless topic.

7:47 AM, May 24, 2020  
Anonymous Denver Guy said...

I know exactly what you mean. I listen to NPR in the morning and find myself dumbfounded by their reporting on Covid. They announce repeatedly that the US is the center point of the pandemic because we have the hghest number of cases and deaths. This is ridiculous - the US is the 3rd most populous country (nation under one government) in the world - what's the point of comparing the totals among countries of different sizes?

Even reports on cases or deaths per million population are largely useless. In Colorado, last week the total number of Covid deaths was dropped by over 300 (1150 to 800 or so) because someone noticed that the figures that had been reported were the number of people who died that tested positive for Covid - not the number of people who died from Covid and it's complications. So included cases like auto traffic deaths and even someone who had died from alcohol poisoning because they had, coincidentally, the Covid infection.

Different countries have adopted wildly different methods of measuring the number of cases (and deaths), and they also vary on how well they do their counting. Right now Belgium is like the worst country in the world for Covid - how likely is that?

2:05 PM, May 24, 2020  

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