Malnutrition is a leading cause of death for persons living with X-linked dystonia-parkinsonism (XDP), a degenerative disease endemic to the Philippines. Difficulty swallowing has been linked to malnutrition in other populations; however, knowledge of this relationship is limited in XDP. As such, the purpose of this study was to determine the association between dysphagia and malnutrition in this population.21 individuals with XDP, 26 controls, and 18 genetic carriers were included in the final data analysis. Spearman's rank order correlation coefficient was used to determine an association between baseline EAT-10 total scores and 12-month malnutrition status, and multiple linear regression to evaluate the predictive ability of the EAT-10. A baseline EAT-10 score cut-off point predicting 12-month malnutrition status was estimated.For the XDP group, the baseline EAT-10 total scores had a significant negative correlation (r = -0.68, p < 0.001) with and was a significant predictor (p = 0.001) of 12-month BMI. A baseline EAT-10 total score of ≥ 4 predicted malnutrition twelve months after administration (sensitivity = 0.93; specificity = 1; AUC = 0.95).Dysphagia, as measured using the EAT-10, was associated with BMI in the XDP population. Additionally, an EAT-10 total score ≥ 4 could predict malnutrition in twelve months after test administration. With these findings, healthcare providers could identify patients with XDP at high risk for malnutrition earlier and provide intervention sooner.