Knowledge of the treatment in schizophrenia and schizoaffective disorder and its relationship with nonadherence

Abstract

Background and objectives. Despite its potential importance for adherence, knowledge of the treatment has been little studied in patients with psychosis. We performed this study to assess the possible association between knowledge of the treatment and nonadherence, unintentional nonadherence (UNA) and intentional nonadherence (INA).

Methods. We assessed 106 consecutively admitted patients diagnosed with schizophrenia or schizoaffective disorder. Evaluations were carried out during hospitalization and after six-months of follow-up. This included sociodemographic, clinical, psychopathologic variables and those related to treatment. Adherence was interpreted as the concurrence of adherence to antipsychotic treatment and adherence to outpatient follow-up over the course of the six-month period. We established two subtypes according to the main reason for nonadherence: unintentional and intentional nonadherence.

Results. Inadequate knowledge of the treatment was detected in 45.3% of patients. Adherent patients, as compared to nonadherent patients, showed no difference regarding knowledge of the treatment (median 77 vs. 77, respectively; p = 0.232). Nevertheless, UNA patients showed worse knowledge of the treatment as compared to adherent patients (median 62 vs. 77 respectively; p < 0.001), whereas INA patients showed better knowledge of the treatment as compared to adherent patients (median 86 vs. 77, respectively; p = 0.026).

Conclusions. A large number of patients with schizophrenia or schizoaffective disorder did not have an appropriate knowledge of their treatment. More importantly, our results suggest that inadequate knowledge of the treatment may contribute to nonadherence in patients with unintentional nonadherence.