标题：Medication adherence in patients with psychotic disorders: an observational survey involving patients before they switch to long-acting injectable risperidone
摘要：Background: Maintaining antipsychotic therapy in psychosis is important in preventing relapse. Long-acting depot preparations can prevent covert non-adherence and thus potentially contribute to better patient outcomes. In this observational survey the main objective is to evaluate medication adherence and its determinants for oral treatment in a large sample of patients with psychosis. Methods: In this cross-sectional survey medication adherence for oral treatment was assessed by patients using the patient-rated Medication Adherence Questionnaire (MAQ). Data were collected by physicians on patients with a recent acute psychotic episode before switching to long-acting injectable risperidone. Other evaluations included disease severity (Clinical Global Impression – Severity), patients’ insight (Positive and Negative Syndrome Scale item G12), treatment acceptance (clinician-rated Compliance Rating Scale), and therapeutic alliance (patient-rated 4-Point ordinal Alliance Scale). Results: A total of 399 psychiatrists enrolled 1,887 patients (mean age 36.8±11.9 years; 61.6% had schizophrenia). Adherence to oral medication was “low” in 53.2% of patients, “medium” in 29.5%, and “high” in 17.3%. Of patients with psychiatrist-rated active acceptance of treatment, 70% had “medium” or “high” MAQ scores ( P <0.0001). Medication adherence was significantly associated with therapeutic alliance (4-Point ordinal Alliance Scale score; P <0.0001). Patient age was significantly associated with adherence: mean age increased with greater adherence (35.6, 36.7, and 38.6 years for patients with “low”, “medium”, and “high” levels of adherence, respectively; P =0.0007), while age <40 years was associated with “low” MAQ classification ( P =0.0003). Poor adherence was also associated with a diagnosis of schizophrenia ( P =0.0083), more severe disease (Clinical Global Impression – Severity ≥4; P <0.0001), and lower insight (Positive and Negative Syndrome Scale-G12 ≥4; P <0.0001). Conclusion: Self-reported adherence was low in most patients, with a strong positive association between self-reported adherence and psychiatrists’ assessment of treatment acceptance. Understanding factors associated with poor medication adherence may help physicians to better manage their patients, thereby improving outcomes.
