Participants will not receive any intervention as a part of this study. Participants with a diagnosis of schizophrenia or schizoaffective disorder receiving oral antipsychotics (OAP) for example, risperidone (1 to 6 milligram [mg] once daily [OD] to twice a day [BID]), olanzapine (5 to 20 mg OD), haloperidol (5 to 20 mg OD to thrice a day [TID]) etc, per their treating physician/clinician instruction will be observed. The primary data source for this study will be the clinical assessments by the treating physician of each participant conducted as a part of routine clinical practice.

This is an observational study. Participants enrolled in this study will continue to receive routine treatment of OAPs for example, risperidone (1 to 6 mg OD to BID), olanzapine (5 to 20 mg OD), haloperidol (5 to 20 mg OD to TID) etc, as directed by their treating physician.

Relapse is defined as achieving any of the following: clinically meaningful worsening of symptoms as determined by the treating physician's judgment; involuntary or voluntary admission to a psychiatric hospital for decompensation of the participant's schizophrenic symptoms (psychiatric hospitalization); deliberate self-injury and/or violent behavior resulting in clinically significant injury to the participant or another person or property damage; suicidal or homicidal ideation and aggressive behavior considered as clinically significant (in frequency and severity) in the treating physician's judgment; an increase of at least 2 points from the lowest reported Clinical Global Impression-Severity (CGI-S) score (ranging from 1 [not ill] to 7 [extremely severe]) captured either at baseline or post baseline. Number of participants with relapse will be determined.

Number of participants in each clinical state (Acute, Stable, and Remission) of schizophrenia will be assessed. The clinical states are defined as: 'Acute' - Clinical Global Impression-Severity (CGI-S) score (ranging from 1 [not ill] to 7 [extremely severe]) greater than or equal to (>=)5 anytime during the study; 'Stable' (Tier I) - control of acute symptoms, defined as having a CGI-S score of less than or equal to (<=)3 for a minimum of 3 months and/or (Tier II) - stable dosage of oral antipsychotic (OAPs) for a minimum of 3 months and control of acute symptoms, defined as having a CGI-S score of <=4 for a minimum of 3 months; and 'Remission' - a continuous CGI-S scale score of <=2 for 6 months.