The Relationship between Type D Personality and Blood Groups Subtypes, and Medication Adherence in Iranian Patients with Type II Diabetes Mellitus

Abstract Purpose The aim of this study was to investigate the relationship between blood groups and personality types, and medication adherence in type 2 diabetes mellitus (T2DM). Methods 302 patients with T2DM were considered in the study. Their sociodemographic information and medical history were recorded. Type D personality and medical adherence were checked using DS-14 and MMAS-8 questionnaires, respectively. Blood samples were obtained from the patients to determine the types of ABO blood groups, HbA1c, fasting blood sugar and lipid profile. Results No significant association was found between the patients' characteristics including demographic and laboratory information and medical adherence to treatment. However, a significant difference in medical adherence was observed between patients with type D personality; According to logistic regression model, patients with type D (OR: 6.23, (95%CI: 2.34–16.55, P < 0.001) had better adherence to medication, while the blood groups was not associated with medical adherence to treatment. Conclusion Type D personality cannot impair medical adherence in these patients. There was an association between type D personality and the ABO blood group, but the ABO blood group was not related to medical adherence.