Pharmacological adherence to oral anticoagulant and factors that influence the international normalized ratio stability.

Cross-sectional study developed to relate the international normalized ratio (INR), used as a parameter to monitor the levels of blood clotting, stability to adherence, age, level of education, socioeconomic level, interaction with other drugs, comorbidities, vitamin K intake, anticoagulation time and drug cost. 156 patients were included, mean age 57 ± 13 years, (53.8%) male, 61 (39.