Patient adherence refers to the extent to which patients follow medical advice, treatment plans, and recommendations provided by healthcare providers. This can include taking medication as prescribed, attending appointments, following dietary guidelines, and making lifestyle changes. Adherence is crucial for the success of medical treatments and interventions, as non-adherence can lead to poorer health outcomes, increased healthcare costs, and a higher risk of complications. Research in patient adherence aims to identify factors that influence adherence, develop interventions to improve adherence, and ultimately help patients better manage their health conditions.