{"code":"C142610","name":"Missing Data","terminology":"ncit","version":"26.09d","conceptStatus":"DEFAULT","leaf":true,"active":true,"synonyms":[{"name":"missing data","termType":"PT","type":"FULL_SYN","typeCode":"P90","source":"CDISC-GLOSS"},{"name":"Missing Data","termType":"PT","type":"FULL_SYN","typeCode":"P90","source":"FDA-NIH-MoRE"},{"name":"Missing Data","termType":"PT","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Missing Data","type":"Preferred_Name","typeCode":"P108"}],"definitions":[{"definition":"Data not completed or corrupted in reports and case report forms, e.g., the data not captured when a subject withdraws from a trial. NOTE: Reviewers are concerned about missing data since patients who are not improved or who believe they have experienced side effects may be particularly prone to leave a trial, thus skewing the analysis of results if such analysis were to be done only on the subjects who had continued with the trial. Trial designs therefore specify plans for how such missing data will be treated in analysis. See also intention to treat. [FDA Guidance on Subject Withdrawal, 2008]","code":"P325","type":"ALT_DEFINITION","source":"CDISC-GLOSS"},{"definition":"Data that would have been used in the study analysis but were not observed, collected, or accessible. These refer to information that was intended to be collected but is absent and information that was not intended to be collected and is therefore absent. In a clinical trial, these are data that would be meaningful for the analysis of a given estimand but were not collected. They should be distinguished from data that do not exist or data that are not considered meaningful because of an intercurrent event. In real-world data sources (eg, electronic health records or claims), there may be special considerations; for example, such data are generally not collected for primary research purposes and therefore may not have systematic data capture to answer a research question.","code":"P325","type":"ALT_DEFINITION","source":"FDA-NIH-MoRE"},{"definition":"Required or expected data that is not present, which may be due to non-completion or corruption.","code":"P97","type":"DEFINITION","source":"NCI"}],"properties":[{"code":"P322","type":"Contributing_Source","value":"CDISC-GLOSS"},{"code":"P322","type":"Contributing_Source","value":"FDA-NIH-MoRE"},{"code":"P208","type":"NCI_META_CUI","value":"CL540542"},{"code":"P106","type":"Semantic_Type","value":"Idea or Concept"}]}