Further analysis revealed that IL-22 serum levels were positively correlated with the percentages of Th22 (r = 0.7417, p = 0.0006; Fig. 4B); IL-17 serum levels were positively correlated with the percentages of Th17 (r = 0.7591, p = 0.0004; Fig. 4B); and serum levels of IFN-γ were positively correlated with the percentages of Th1 cells (r = 0.8152, p<0.0001, Fig. 4B) in newly diagnosed HT patients. Here, IL22 is linked to hematocrit.