Fig. 4.

Laboratory tests values and distribution for each study. Error bars correspond to the interquartile range. Dashed vertical line equals the upper limit of normal (CRP, white blood cells, ferritin, d-dimers, IL6, and troponin) or the lower limit of normal (sodium, lymphocytes, and platelets). For studies that report multiple values for the same test, the maximum (CRP, white blood cells, ferritin, d-dimers, IL6, and troponin) or the minimum (sodium, lymphocytes, platelets) was used. “Covid” (red line) equals values corresponding to the COVID-19-related hyperinflammatory syndrome; “control” (gray line) equal values corresponding to the control populations with Kawasaki disease described by Pouletty et al. [64] and Whittaker et al. [15] and (orange line) non-PIMS-TS/MIS(-C) pediatric COVID-19 by Swann et al. [23]. Data from Swann et al. [23], Rostad et al. [26], and Weisberg et al [25]. was extracted from pre-print publications and these references have subsequently been published in the peer-reviewed literature [27–29]