Adherence in healthcare refers to the extent to which patients follow the recommendations, guidance, or instructions provided to them by healthcare providers. This can include taking prescribed medications as directed, following a specific treatment plan, attending scheduled appointments, and making recommended lifestyle changes. Adherence is an important aspect of patient care as it directly impacts the effectiveness of treatments and the overall health outcomes of individuals. Researchers in this area study various factors that influence adherence, develop strategies to improve adherence rates, and assess the impact of adherence on patient outcomes.