CXCL8 and oculopharyngeal muscular dystrophy: The sensitivity and specificity, as well as the predictive value, of PCR measurements of salivary IL-8 mRNA were not as strong as those for salivary IL-8 protein using ELISA, similar to a study by St John et al. [12] No statistically significant difference was seen in the present study concerning the type of OPMD and clinical grade of OSMF to either salivary IL-8 protein or IL-8 mRNA, as aligned with a study by Rajkumar et al. [18].