CI, confidence interval; HCQ, hydroxychloroquine; ANA, antinuclear antibody; ITP, thrombocytopenia; IVIG, intravenous immunoglobulin; TPO-RA, thrombopoietin receptor agonist.

* Its unit is 10⁹/L. For categorical variables, this indicates the mean difference between the exposed and non-exposed groups; for continuous variables, this indicates the increased platelet counts per one unit increase of the variable.

† Time since onset of ITP.

Table 4 Side effects of HCQ.