The IVW method indicated that interleukin-10 levels (IL-10) were significantly associated with MS (OR = 0.97, 95% CI: 0.95–0.99, p = 4.04E-03), RA (OR = 1.04, 95% CI: 1.01–1.06, p = 1.13E-03), and HT (OR = 1.05, 95% CI: 1.02–1.08, p = 3.87E-04), as detailed in Figure 4. Here, IL10 is linked to hematocrit.