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  string(678) "Symptom manifestations in studies of psychiatric disorders can be subtle. Small imprecisions in measurement can lead to over- or under-estimation of change. One strategy to improve measurement is to conduct logical consistency checks within and across measures.  The International Society for CNS Clinical Trials and Methodology convened an expert working-group that assembled consistency/inconsistency flags for the Personal and Social Performance Scale for the purpose of improving the quality of measurement when using this scale.  Flags will be applied to assessments derived from clinical trials to help understand how often various potential scoring inconsistencies occur."
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      string(3) "PhD"
      ["p_pers_pr_affil"]=>
      string(18) "Bar Ilan Univerity"
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      string(244) "NCT00111189 - A Randomized Double-blind Placebo-controlled Parallel Group Study Evaluating Paliperidone Palmitate in the Prevention of Recurrence in Patients With Schizophrenia. Placebo Consists of 20% Intralipid (200 mg/mL) Injectable Emulsion"
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  ["project_date_type"]=>
  string(91) "Individual Participant-Level Data, which includes Full CSR and all supporting documentation"
  ["property_scientific_abstract"]=>
  string(1207) "Background: Symptom manifestations in schizophrenia can be subtle. Small imprecisions in measurement can lead to over- or under-estimation of change. One strategy to improve measurement is to conduct logical consistency checks between item responses (i.e., cross-sectionally) and across test administrations (i.e., longitudinally) of rating scales, bearing in mind that some degree of inconsistency is to be expected due to subject-based variability.   Objective: To determine the relevance of continuity checks to data from the Personal and Social Performance Scale (PSP).  Study Design: International Society for CNS Clinical Trials and Methodology convened an expert Working Group that assembled consistency/inconsistency flags for the Personal and Social Performance Scale (PSP).  Participants:  Data sets are being requested from sponsors who conducted clinical trials that used the PSP and the PANSS.  Main outcome measure: Frequency with which each of the potential scoring inconsistencies occurs.  Statistical analysis:  Descriptive analysis of frequency of occurrence of each of the potential scoring inconsistencies.  Trials or investigators will not be identified in the reporting of the results."
  ["project_brief_bg"]=>
  string(1139) "Symptom manifestations in schizophrenia can be subtle. Small imprecisions in measurement can lead to over- or under-estimation of change. One strategy to improve measurement is to conduct logical consistency checks between item responses (i.e., cross-sectionally) and across test administrations (i.e., longitudinally) of rating scales, bearing in mind that some degree of inconsistency is to be expected due to subject-based variability.   The International Society for Central Nervous System (CNS) Clinical Trials and Methodology (ISCTM) expert Working Group focusing on improving consistency in measurement  has been developing algorithms for flags to identify possible errors in use of rating scales widely used in our field.  The model includes developing an algorithm based on the ?expert opinion? of the working group and then testing it in data sets.  Recommendations have been published for Positive and Negative Syndrome Scale (PANSS) (Rabinowitz, Schooler, et al 2017) and Montgomery-Asberg Depression Rating Scale (MADRS) (Rabinowitz, Schooler et al, 2019).

The current focus is the Personal and Social Performance (PSP)."
  ["project_specific_aims"]=>
  string(261) "Apply algorithm developed based on expert opinion to detect scoring inconsistencies in the use of the Personal and Social Performance scale.  Algorithm to be applied to data sets from various clinical trials.  Recommendations based on this work to be published."
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      ["label"]=>
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    ["label"]=>
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  string(307) "Data on all subjects with available data on PSP domain and total scores, PANSS item level data, Clinical Global Rating of severity (CGI-s) data by visit with sequential subject identifiers.

Please note that I do not need patient demographic, psychiatric history, or safety data nor subject id numbers."
  ["project_main_outcome_measure"]=>
  string(113) "Frequency of occurrence of potential scoring inconsistency based on expert consensus derived inconsistency flags."
  ["project_main_predictor_indep"]=>
  string(295) "There is no independent variable for this project.  Potential scoring inconsistencies are defined based on the inconsistency flags developed by the expert working group of the International Society for CNS Clinical Trials and Methodology.   The inconsistency flags are attached to this proposal."
  ["project_other_variables_interest"]=>
  string(3) "N/A"
  ["project_stat_analysis_plan"]=>
  string(433) "New variables identifying inconsistencies in a given rating will be added to the data set.  Each flag will be a new variable (See attached inconsistency flags).  Using descriptive analysis, the data will be analyzed  to examine the frequency with which each of the the potential inconsistencies occurs.  Number of times that each flag occurs will be examined as will the number of times multiple flags occur in a single rating occur."
  ["project_timeline"]=>
  string(336) "Once I obtain data sets I will apply consistency flags to the data sets.  Data management and analysis are anticipated to take 4 months.   The descriptive analysis emanating from this work will be included in a manuscript presenting the consistency flags .   I anticipate the production of a manuscript for publication within 12 months."
  ["project_dissemination_plan"]=>
  string(299) "As previously done for the PANSS (Rabinowitz,et al, 2017) and MADRS (Rabinowitz et al, 2019) the goal is to produce a journal manuscript presenting the inconsistency flags for the PSP, the frequency of their occurrence in available data and recommendations.   Target journal: Schizophrenia Research."
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  string(483) "
Rabinowitz J, Schooler NR, Anderson A, et al. Consistency checks to improve measurement with the Positive and Negative Syndrome Scale (PANSS). Schizophr Res. 2017;190:74?76. doi:10.1016/j.schres.2017.03.017

Rabinowitz J, Schooler NR, Brown B, Dalsgaard M, Engelhardt N, Friedberger G, et al. Consistency checks to improve measurement with the Montgomery-Asberg Depression Rating Scale (MADRS). J Affect Disord. 2019;256:143-7.  https://doi.org/10.1016/j.jad.2019.05.077
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data partner
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pi country
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pi affil
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products
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num of trials
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