Please select the eligibility criteria that correspond to the clinical trial below.
Title: Risperidone Maintenance Treatment for Relapse Prevention in Schizophrenia
Brief Summary: This study set out to determine the duration of maintenance treatment with therapeutic risperidone dose in schizophrenia. In a multi-center, open label, randomized, controlled study design, patients with schizophrenia who were clinically stabilized following an acute episode were randomly assigned to a 'maintenance group' (optimal therapeutic doses continued for at least 1 year), a 4-week group (optimal therapeutic doses continued for 4 weeks followed by a 50% dose reduction that was maintained for at least 11 months) or a 26-week group (optimal therapeutic doses continued for 26 weeks followed by a 50% dose reduction for at least another 6 months).


Options:
A: Inclusion Criteria:

* Patients who meet the diagnostic criteria for schizophrenia according to DSM-IV-TM for at least 1 year before screening
* have a PANSS score of \<120
* have a body mass index (BMI) \>/=15.0 kilogram (kg)/meter (m)2
* and have resided at the same address for at least 30 days

Exclusion Criteria:

* Patients unable to provide their own consent
* have been involuntarily committed to psychiatric hospitalization
* have primary, active DSM-IV-TM diagnosis other than schizophrenia
* who have a DSM-IV-TM diagnosis of active substance dependence within 3 months before screening (nicotine and caffeine are not exclusionary)
* have a history of treatment resistance as defined by failure to respond to 2 adequate trials (minimum of 4 weeks at a therapeutic dose) of different antipsychotic medications
* have a history of any severe preexisting gastrointestinal narrowing or inability to swallow the medication whole with water
* have a history of neuroleptic malignant syndrome (NMS)
* are at significant risk of suicidal or violent behavior
* current presence of any significant or unstable medication condition
* treatment with any protocol disallowed therapies
* clinically significant result from screening laboratory or ECG.
B: Inclusion Criteria:

* Patients diagnosed with schizophrenia or schizoaffective disorder
* stable with respect to disease symptoms and other medical conditions
* stable on any oral antipsychotic drug (except clozapine) for 4 weeks before the study
* patients identify a relative or acquaintance who can complete a questionnaire with additional information about the patient
* if female, using birth control.

Exclusion Criteria:

* Patient is not eligible if currently hospitalized, or was treated for an acute disease-related crisis within the past 4 weeks
* at risk to self or others
* use of injectable antipsychotic drugs or electroconvulsive therapy within past 6 months, or currently using carbamazepineor an oral antipsychotic drug in a dose that is higher than 8 milligrams per day in risperidone equivalents, of long-acting risperidone in an earlier study, of clozapine, or use of investigational drugs within 30 days, or of electroconvulsive therapy within past 6 months
* presence of liver or kidney damage
* history of neuroleptic malignant syndrome
* if pregnant or breast-feeding
* not using birth control
* abusing drugs or alcohol.
C: Inclusion Criteria:

Main inclusion criteria

* The subject has a primary diagnosis of schizophrenia
* The subject experiences clinically significant symptoms
* The subject's medication remained stable for 8 weeks prior to screening
* The subject is currently in the post-acute maintenance phase of his/her disease

Exclusion Criteria:

Main exclusion criteria

* The subject is at significant risk of suicide
* The subject is treatment resistant
* The subject has experienced an acute exacerbation within 8 weeks prior screening
* The subject is unlikely to comply with the protocol
* The subject has a current diagnosis or a history of substance abuse
D: Inclusion Criteria:

1. in- or outpatient of either sex diagnosed with DSM-IV schizophrenia
2. having been clinically stable following an acute episode for at least 4 but less than 8 weeks, with 'clinical stability' defined as a sum score of the Brief Psychiatric Rating Scale (BPRS) of less than 36 points
3. aged between 18 and 65 years
4. receiving risperidone monotherapy titrated to optimal level in the acute phase of treatment for the psychotic episode
5. local resident, living with at least one family member after discharge
6. having satisfactory treatment adherence defined by a pill count that yielded more than 80% adherence to risperidone prescription over the past 4 weeks
7. understanding the aims of the study and having signed the consent form

Exclusion Criteria:

1. taking antidepressants, mood stabilizers, and Chinese herbal remedies concomitantly with risperidone, or having received electroconvulsive therapy (ECT), or participating in any other drug trials or interventional studies over the 4 weeks before study entry
2. having a history or ongoing experience of major chronic medical or neurological condition(s) requiring treatment that would be likely to affect psychic functions
3. past or current drug/alcohol abuse other than nicotine
4. being pregnant or having plans to become pregnant, lactating, or not practicing an effective method of birth control

Answer: D