I can deduce that "Patronymic" is "a name derived from the name of a father or ancestor", but I do not believe many native speakers I cross paths with can.
In any case, studies like this mention the total number of people who took the test (81,337 participants), but then, by definition, the effects come from small subgroups. E.g.,
> People who had been hospitalised showed substantial scaled global performance deficits dependent on whether they were (-0.47 standard deviations (SDs) N = 44) vs. were not (-0.26 SDs N = 148) put onto a ventilator. Those who remained at home (i.e., without inpatient support) showed small statistically significant global performance deficits (assisted at home for respiratory difficulty -0.13 SD N = 173; no medical assistance but respiratory difficulty -0.07 SDs N = 3,386; ill without respiratory difficulty -0.04 SDs N = 8,938).
The 44 people who were put on ventilators are different on other dimensions. It is hard to separate the effects of the news ("you have a horrible disease"), the medical treatment, and the psychological torment associated with being in a hospital during this time from the actual effects of the actual virus.
[1]: https://www.thelancet.com/action/showPdf?pii=S2589-5370%2821...