The IVW effect estimates of PTSD on autoimmune thyroid disease (N = 38 instruments, beta = 0.11, SE = 0.04, p = 0.01) and CRP (N = 38 instruments; beta = 0.069, SE = 0.02, p = 0.001) were comparable in magnitude to the original estimates. Here, CRP is linked to autoimmune thyroid disease.