Evaluating Isradipine for Cognitive Enhancement in Schizophrenia and Schizoaffective Disorder

MATRICS Consensus Cognitive Battery (MCCB) as measure of Neurocognitive/Functional Measures is a standardized battery designed to measure cognitive functioning in people with schizophrenia. The MCCB is represented as a composite T score. A t score is a type of standard score computed by multiplying a z-score (how many standard deviations an element is from the mean) by 10 and adding 50.

UCSD Performance Skills Assessment (UPSA) - The UPSA is performance-based measure of real-world daily functioning abilities. Participants receive scores for the communication subscale (range = 0-20), with higher score indicating better neurocognitive functioning

The QoL is a measure of the perceived satisfaction in an individual's daily life. This 16-item self-report measure is rated on a 7-point scale, ranging from 1 (terrible) to 7 (delighted), with a total score range from 16-112, where higher scores indicate higher satisfaction with daily life.

The PRISE is a physician-administered checklist of adverse events. PRISE contains 33 items, each defined by an adverse event. Each item is rated on a 3-point scale, ranging from 0 (not present) to 2 (distressing), with a total score range from 0-66, where higher scores indicate more adverse events. Mean change for adverse events at week 4 as compared to baseline

Number of participants with normal ECG readings to confirm inclusion into study and compared at week 4 to baseline

Number of participants with normal chemistry panel to confirm inclusion into study at baseline and week

Number of participants with normal CBC to confirm inclusion into study at baseline and week 4

Mean change for abnormal involuntary movements throughout the study. The AIMS is a physician-administered scale of abnormal involuntary movements. AIMS consists of 10 items, each defined by a series of movements. Each item is rated on a 5-point scale, ranging from 0 (not observed) to 4 (severe), with a total score range from 0-40, where higher scores indicate abnormal involuntary movements.

Mean change for drug-induced disordered movement throughout the study. The MSAS is a physician-administered scale of abnormal drug-induced movements. MSAS consists of 6 items, each defined by a series of movements. Each item is rated on a 5-point scale, ranging form 0 (not observed) to 4 (most severe), with a total range of 0-24, where higher scores indicate drug-induced disordered movement.

a 21-question multiple choice, self-report inventory that is used for measuring the severity of suicidal ideation. Scoring is from a 0 (not at all) to 3 (severe) with a total score range of 0-63. Higher total scores indicate more severe suicidal ideation symptoms.

Number of participants with Suicidal acknowledgements based on the Columbia Suicide Severity Rating Scales (C-SSRS) - Full range from 0 (low intensity suicidal ideation to 9 (high intensity suicidal ideation).

Number of participants with confirm diagnosis for inclusion into study using the Structured Clinical Interview for the DSM-IV (SCID-IV)

Mean change for positive symptoms throughout the study. BPRS consists of 18 items, each defined by a series of symptoms. Each item is rated on a 7-point scale, ranging from 1 (not observed) to 7 (very severe), with a total score range from 18-126, where higher scores indicate psychiatric symptoms.

Mean change of negative symptoms throughout the study. SANS consists of 22 items, each defined by a series of symptoms. Each item is rated on a 6-point scale, ranging from 0 (no presence) to 5 (severe presence), with a total range of 0-110, where higher scores indicate negative symptoms.

Mean change of symptoms of depression throughout the study. HRSD consists of 14 items, each defined by a series of symptoms. Each item is rated on a 5-point scale, ranging from 0 (not present) to 4 (severe), with a total score range of 0-56, where higher score indicates more depressive symptoms

Mean change of clinical impression of severity of psychiatric illness throughout the study. CGI consists of one item, defined by severity of illness. It is rated on a 7-point scale, ranging from 1 (normal, not at all ill) to 7 (among the most extremely ill patients), with a total range score of 1-7, where higher score indicates severity of illness.

Mean change of symptoms of mania throughout the study. CARS-M contains 14 items rated from 0 (absent) to 5 (present) and one item scored 0 to 4, with total range from 0 to 74, where higher score indicates manic symptoms.