Low incidence of neurological recurrent side effects following COVID-19 reimmunization

We thank Leeet al. who suggested that confounding may be present and proposed that we perform propensity score methods,1,2 traditionally used to address non-random allocation to treatment and control groups to overcome selection effects. We were careful to avoid the language of causality in our paper3 as we completely agree that confounding is a possibility. In the cases presented in our paper, we do not present any variable resembling a treatment or control arm. Both reimmunization and timeliness of reimmunization are, implicitly, end points of the analyses. Nevertheless, we are grateful for the chance to further explore the possibility of confounding.
Source: QJM - Category: Internal Medicine Source Type: research