Response was defined as decrease of at least 30 percent in total Positive and Negative Syndrome Scale (PANSS) score from Baseline to endpoint of core phase (which is, Day 42 or early discontinuation). The PANSS is a 30-item scale designed to assess various symptoms of schizophrenia including delusions, grandiosity, blunted affect, poor attention, & 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 sum of all 30 PANSS items & ranges from 30 to 210. Higher scores indicate worsening.

Intent-to-treat (ITT) population included all participants who received at least one dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement.

The PANSS is a 30-item scale 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 and ranges from 30 to 210. Higher scores indicate worsening. Final evaluation is the last post-baseline visit with data.

The ITT population included all participants who received at least one dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement. "n" signifies those participants who were evaluated for this measure at given time points.

The PANSS is a 30-item scale to assess neuropsychiatric symptoms of schizophrenia. The symptoms are rated on a 7-point scale from 1 (absent) to 7 (extreme psychopathology). Positive symptoms subscale consists of 8 items with total score range of 8-56; negative symptoms and disorganized thoughts subscale, consists of 7 items with total score range of 7-49, uncontrolled hostility/excitement (H/E) subscale and anxiety/depression subscale, each consists of 4 items with total score range of 4-28. Higher score indicates greater severity. Final evaluation is the last post-baseline visit with data.

The ITT population included all participants who received at least one dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement.

The PANSS is a 30-item scale 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 and ranges from 30 to 210. Higher scores indicate worsening. Final evaluation is the last post-baseline visit with data.

The ITT population included all participants who received at least one dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement.

The CGI-S rating scale is a 7 point global 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 worsening. Final evaluation is the last post-baseline visit with data.

The ITT population included all participants who received at least 1 dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure and "n" signifies those participants who were evaluated for this measure at given time points.

The PSP assesses the degree of dysfunction within 4 domains of behavior: socially useful activities, personal & social relationships, self-care & disturbing and aggressive behavior. The score ranges from 1 to 100, divided into 10 equal intervals to rate the degree of difficulty (1, absent to 6, very severe) in each of 4 domains. Participants with a score of 71 to 100 have a 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. Final evaluation is the last post-baseline visit with data.

The ITT population included all participants who received at least 1 dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure and "n" signifies those participants who were evaluated for this measure at given time points.

The sleep evaluation scale is a self-administered scale that rates quality of sleep. Participants indicate on an 11-point scale that how well they have slept within the previous 7 days, score ranged from 0 (very badly) to 10 (very well). Final evaluation is the last post-baseline visit with data.

The ITT population included all participants who received at least 1 dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure and "n" signifies those participants who were evaluated for this measure at given time points.

The day time drowsiness evaluation scale is a self-administered scale that rates day time drowsiness. Participants indicate on an 11-point scale that how often they have felt drowsy within the previous 7 days, score ranged from 0 (not at all) to 10 (all the time). Final evaluation is the last post-baseline visit with data.

The ITT population included all participants who received at least 1 dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure and "n" signifies those participants who were evaluated for this measure at given time points.

Treatment satisfaction with paliperidone ER was assessed by the Investigator and participant on a 5-point scale: 1 (very good), 2 (good), 3 (reasonable), 4 (moderate) and 5 (poor), at the end of the core treatment phase (which is, Day 42 or early discontinuation) by conducting an interview.

The ITT population included all participants who received at least 1 dose of paliperidone ER and provided at least 1 post-baseline efficacy measurement. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure at given time point.

The AIMS is a 12-item scale to provide a numeric measure to the observed abnormal movements in different parts of the body. Information is collected after a brief neurological examination and is scored on a 5-point scale (0=none and 4=severe). Final evaluation is the last post-baseline visit with data.

Safety population included all participants who received at least 1 dose of paliperidone ER and had at least 1 post-baseline safety assessment. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure and "n" signifies those participants who were evaluated for this measure at given time points.

The SAS is a 10-item scale used to measure the symptoms of parkinsonism (slow movements) or parkinsonian side-effects related to the use of antipsychotic medications. The SAS rates 10 items (including gait, arm dropping, shoulder shaking, elbow rigidity, wrist rigidity, leg pendulousness, head dropping, Glabella tap, tremor and salivation), score ranging from 0 (normal) to 4 (extreme). The SAS global score is the average score (total sum of items score divided by the number of items) and ranges between 0 and 4, where the higher score indicates more severe condition of Extrapyramidal Symptoms. Final evaluation is the last post- baseline visit with data.

Safety population included all participants who received at least 1 dose of paliperidone ER and had at least 1 post-baseline safety assessment. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure and "n" signifies those participants who were evaluated for this measure at given time points.

The BARS included an objective rating (from 0=normal to 3=constantly engaged), two subjective ratings of symptoms of akathisia, namely awareness of restlessness (ranging from 0=absence of inner restlessness to 3=awareness of intense compulsion to move) and reported distress related to restlessness (ranging from 0=no distress to 3=severe), and a global clinical rating of akathisia, ranging from 0 (absent) to 5 (severe). Global rating sub-scale score (that is, global clinical rating of akathisia) was assessed which was scored separately and is the most relevant measure of severity of akathisia. Higher scores indicates worsening akathisia. Final evaluation is the last post-baseline visit with data.

Safety population included all participants who received at least 1 dose of paliperidone ER and had at least 1 post-baseline safety assessment. "N" (number of participants analyzed) signifies those participants who were evaluable for this measure and "n" signifies those participants who were evaluated for this measure at given time points.