IL6 and oculopharyngeal muscular dystrophy: Meta-analysis showed that IL-6 concentration was significantly higher in OPMD patients in comparison to healthy controls (SMD = 0.97; 95% CI 0.35 to 1.59) (Fig. 4a), while OC patients showed significantly higher IL-6 concentrations in comparison to the OPMD group (SMD = 0.97; 95% CI 1.49 to 0.46) (Fig. 4b).