Number of days from baseline (day 1 of core phase) to relapse as evaluated according the Csernansky criteria. A patient was considered to have relapsed if they met one or more of the following criteria: (1) psychiatric hospitalization; (2) an increase in the level of psychiatric care and an increase of 25 percent (%) from baseline in the Positive And Negative Syndrome Score (PANSS) total score (or an increase of 10 points if the baseline score was 40 or less); (3) deliberate self-injury; (4) suicidal or homicidal ideation that was clinically significant in the investigator's judgment; (5) violent behavior resulting in clinically significant injury to another person or property damage; (6) substantial clinical deterioration, defined as a change score of 6 ("much worse") or 7 ("very much worse") on the Clinical Global Impressions Scale (CGI-C); and/or (7) the required dose of the antipsychotic exceeds the maximum approved dose.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The proportion of patients achieving a treatment response, defined as a ≥30% decrease (i.e., improvement) in Positive and Negative Syndrome Scale (PANSS) total score from baseline to endpoint. The PANSS is a 30-item scale (Range 30-210) designed to assess various symptoms of schizophrenia including delusions, grandiosity, blunted affect, poor attention, and poor impulse control. The 30 symptoms are rated on a 7-point scale that ranges from 1 (absent) to 7 (extreme psychopathology). The PANSS total score consists of the sum of all 30 PANSS items. Higher scores indicate increased severity of schizophrenia symptoms.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

Change from baseline in the PANSS: The PANSS is a 30-item scale (Range 30-210) designed to assess various symptoms of schizophrenia including delusions, grandiosity, blunted affect, poor attention, and poor impulse control. The 30 symptoms are rated on a 7-point scale that ranges from 1 (absent) to 7 (extreme psychopathology). The PANSS total score consists of the sum of all 30 PANSS items. Higher scores indicate worsening.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

Change from baseline in positive symptom, negative symptom and general psychopathology subscales of the PANSS scale. The PANSS scale is designed to assess symptoms of schizophrenia by means of the 30-items. The PANSS scale provides subscores for 3 subscales, that is, the positive symptoms subscale (7 items, range 7-49), the negative symptoms subscale (7 items, range 7-49), and the general psychopathology subscale (16 items, range 16-112). Each item of the scale is to be scored on a scale of 1 (absent) to 7 (extreme). Higher scores indicate higher severity of schizophrenia symptoms.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

Change from baseline in schizophrenia symptoms were assessed through the following PANSS factor scores as described by Marder: (1) positive symptoms (range 8-56): sum of delusions, hallucinatory behavior, grandiosity, suspiciousness, stereotyped thinking, somatic concern, unusual thought content, lack of judgment and insight; (2) negative symptoms (range 7-49): sum of blunted affect, emotional withdrawal, poor rapport, passive social withdrawal, lack of spontaneity, motor retardation, and active social avoidance; (3) disorganized thoughts (range 7-49): sum of conceptual disorganization, difficulty in abstract thinking, mannerisms and posturing, disorientation, poor attention, disturbance of volition, and preoccupation; (4) uncontrolled hostility/excitement (range 4-28): sum of excitement, hostility, uncooperativeness and poor impulse control; (5) anxiety/depression (range 4-28): sum of anxiety, guilt feelings, tension, and depression. Higher scores indicate higher severity of symptoms

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The Clinical Global Impression Severity (CGI-S) rating scale is a 7 point global clinical assessment that measures the clinician's impression of the severity of illness exhibited by a participant. A rating of 1 is equivalent to "Normal, not at all ill" and a rating of 7 is equivalent to "Among the most extremely ill participants". Higher scores indicate higher impression of illness severity.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The Clinical Global Impression-Change (CGI-C) rating scale is used to rate the change in severity of the patient's illness compared to baseline (day 1 of core phase) on a 7-point scale ranging from 1 (very much improved) to 7 (very much worse).

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The Personal and Social Performance (PSP) scale assesses degree of a participant's dysfunction within 4 domains of behavior: socially useful activities, personal and social relationships, self-care, and disturbing and aggressive behavior. Score ranges from 1 to 100, divided into 10 equal intervals to rate degree of difficulty (1, absent to 6, very severe) in each of the 4 domains. Based on 4 domains there will be 1 total score. Participants with score of 71 to 100 have mild degree of difficulty; from 31 to 70, varying degrees of disability; less than or equal to 30, functioning so poorly as to require intensive supervision.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The Short Form-36 Health Survey (SF-36) is a measure of Participant-reported health status. It is a 36-item questionnaire measuring 8 domains (physical functioning, role physical, bodily pain, general health, vitality, social functioning, role emotional, and mental health). Two summary scale scores are computed based on weighted combinations of the 8 subscale scores: the Physical Component Summary and the Mental Component Summary. Each summary scale score ranges from 0 (worst) to 100 (best), with higher scores reflecting better health-related functional status.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The EQ-5D VAS records the respondent's self-rated health on a vertical, visual analog scale, with 0 representing the worst imaginable health state and 100 representing the best imaginable health state. The EQ VAS is used as a quantitative measure of health outcome as judged by the individual respondent.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The EuroQol-5 is a five dimensional health state classification. Each dimension is assessed on a 3-point ordinal scale (1=no problems, 2=some problems, 3=extreme problems). The responses to the five EQ-5D dimensions were scored using a utility-weighted algorithm to derive an EQ-5D health status index score between 0 to 1, with 1.00 indicating "full health" and 0 representing dead. A higher score indicates an improvement in health in the Health Status Index.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

The SWN-S is a patient self-rated scale developed to measure the subjective well-being for the previous 7 days of a patient under neuroleptic treatment. The SWN-S consists of 20 items (each item is rated from 1=not at all to 6=very much). The total score ranges from 20 to 120 with higher score indicating greater subjective well-being.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

Patient's satisfaction with medication was assessed using the Treatment Satisfaction Questionnaire for Medication (TSQM). The TSQM is divided into 4 subscales (effectiveness, side effects, convenience, and global satisfaction), with the value of each subscale ranging from 0 to 100. Higher scores indicate greater treatment satisfaction.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

Physician's treatment satisfaction was assessed using the physician's treatment satisfaction scale which is designed to rate 4 aspects of treatment (efficacy, safety, mode of administration, and overall satisfaction), each on a scale ranging from 1 (extremely satisfied) to 7 (extremely dissatisfied).

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment

Number of participants with a relapse event with relapses evaluated according the Csernansky criteria. A patient was considered to have relapsed if they met one or more of the following criteria: (1) psychiatric hospitalization; (2) an increase in the level of psychiatric care and an increase of 25% from baseline in the PANSS total score (or an increase of 10 points if the baseline score was 40 or less); (3) deliberate self-injury; (4) suicidal or homicidal ideation that was clinically significant in the investigator's judgment; (5) violent behavior resulting in clinically significant injury to another person or property damage; (6) substantial clinical deterioration, defined as a change score of 6 ("much worse") or 7 ("very much worse") on the Clinical Global Impressions Scale (CGI-C); and/or (7) the required dose of the antipsychotic exceeds the maximum approved dose.

all randomized subjects who responded at the end of the 2-week initial acute oral treatment phase, who also received at least one dose of study medication during the 24-month core treatment phase and provided at least one post-baseline efficacy assessment