The purpose of the study is to monitor the general functional changes among patients with schizophrenia, treated with atypical antipsychotics dosed once daily for a period of 6 months.The primary study objective is to compare general functioning of patients with schizophrenia treated with Seroquel SR between baseline and the last study visit. The secondary study objectives are to compare general functioning of patients with schizophrenia treated with other atypical antipsychotic medicinal products administered once daily between baseline and the last study visit, monitoring of other indicators of clinical improvement, evaluation of patient compliance and assessment of occurrence of adverse effects