Background: Human blood groups may play a key role in various human diseases. An association has been found between ABO blood groups and both infectious and non-infectious diseases of the gastrointestinal tract and other organs. Dyspepsia is one of the most common encountered gastrointestinal complaints. Aims: To investigate the association between ABO blood groups and severity of dyspepsia symptoms in a specific ethnic group. Study Design: Cross-sectional study. Methods: Consecutive adult Nias tribe dyspepsia outpatients in the General District Hospital, Gunungsitoli Nias,Indonesia, were interviewed using a structured questionnaire between May–June 2018. The severity of dyspepsia was assessed with the Porto Alegre Dyspeptic Symptoms Questionnaire (PADYQ) scoring instrument. ABO blood groups were determined by a standard direct agglutination test. Upper gastrointestinal endoscopy was performed in all participants. Data were statistically analyzed using statistical software. P value less than 0.05 was considered as statistically significant. Results: Of 66 patients, 54.5% were males, with median age of 47 years (range, 23–67). Majority of the participants had blood group O (48.5%). The most encountered dyspepsia symptom was epigastric pain (66.7%). Participants with blood group type B had significantly more severe dyspepsia symptoms based on total PADYQ score (p=0.017). Participants with blood group type O were more prone to epigastric pain (p=0.015), while blood group type B to bloating (p=0.01) and early satiation (p=0.02). Conclusion In outpatients from the Nias tribe with dyspepsia, those with blood group type B had more severe dyspepsia symptoms.
ABO Blood-Group System