I don’t know if I’ve looked at those particular ones but I’ve looked at a bunch. At this point I’m convinced that any study with improper controls will find a lot of Long Covid, and it doesn’t mean much, because people report everything as Long Covid.
And that if a study claims that Long Covid isn’t correlated with severity of Covid, it’s not properly controlled. This was never plausible to me, and the recent finding that Germans who didn’t know they had Covid didn’t report any Long Covid symptoms either seems conclusive that it can’t be right.
Thanks for responding. The first study did find that severity is correlated with incidence of long COVID, and controlled as follows: “Propensity score 1:1 matching [19] (with greedy nearest neighbor matching, and a caliper distance of 0.1 pooled standard deviations of the logit of the propensity score) was used to create cohorts with matched baseline characteristics and carried out within the TriNetX network” My knowledge of statistical analysis is rather insufficient to evaluate the controls in that study, so hoping you or another commenter can chime in on that.
I don’t know if I’ve looked at those particular ones but I’ve looked at a bunch. At this point I’m convinced that any study with improper controls will find a lot of Long Covid, and it doesn’t mean much, because people report everything as Long Covid.
And that if a study claims that Long Covid isn’t correlated with severity of Covid, it’s not properly controlled. This was never plausible to me, and the recent finding that Germans who didn’t know they had Covid didn’t report any Long Covid symptoms either seems conclusive that it can’t be right.
Thanks for responding. The first study did find that severity is correlated with incidence of long COVID, and controlled as follows: “Propensity score 1:1 matching [19] (with greedy nearest neighbor matching, and a caliper distance of 0.1 pooled standard deviations of the logit of the propensity score) was used to create cohorts with matched baseline characteristics and carried out within the TriNetX network” My knowledge of statistical analysis is rather insufficient to evaluate the controls in that study, so hoping you or another commenter can chime in on that.