Cohort Attrition Study Results Part IV: SSDQA Comparison


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dc.contributor.authorWieand, Kaleigh
dc.contributor.otherPEDSnet Data Coordinating Center
dc.date.accessioned2026-02-25T19:31:40Z
dc.date.created2026-01-30
dc.description- An additional attrition criteria requiring patients to have 2 or more SCA diagnoses was added as a proxy for lab confirmed diagnoses. Lab-confirmed diagnoses were not evaluated due to separate data quality issues with lab result values. - Most sites did not experience significant patient loss, but Nationwide lost a significant number of patients after this criteria was applied. - Subsequent analyses revealed this significantly improved covariate population in the cohort and addressed other DQ concerns, so we found this was a positive result.
dc.description.abstractThe results of a Cohort Attrition check using the Multi-Site, Exploratory, Cross-Sectional parameters. This check evaluates patient retention at each step of the attrition, after an additional attrition step was added requiring 2 or more Sickle Cell Anemia (SCA) diagnoses for each patient.
dc.identifier.urihttps://hdl.handle.net/20.500.14642/1225.4
dc.identifier.urihttps://doi.org/10.24373/pdsp-503.4
dc.publisherPEDSnet
dc.rightsa CC-BY Attribution 4.0 license.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectCross-Sectional Analysis
dc.subjectMulti-Site Analysis
dc.subjectExploratory Analysis
dc.subjectPerson-Level Analysis
dc.subject.meshAnemia, Sickle Cell
dc.subject.meshHematologic Tests
dc.subject.meshHematologic Diseases
dc.titleCohort Attrition Study Results Part IV: SSDQA Comparison
dc.typestudy
dspace.entity.typeDQResult
local.admin.notev57
local.description.outcomesWe decided to move forward with this updated attrition, but we will conduct additional DQ analyses to make sure covariates are still populated as expected in this updated cohort.
local.dqcheck.outcomesAdditional DQ Investigation
local.dqcheck.resultobsDisparate Site Behavior
local.dqcheck.resultobsUnexpected Patient Retention
local.subject.DataProvPEDSnet Data Source
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VersionDateSummary
4*
 2026-02-25 14:29:03
Fourth round of cohort attrition conducted after after an additional attrition step was added requiring 2 or more Sickle Cell Anemia (SCA) diagnoses for each patient.
3
 2025-12-19 11:47:51
Third round of cohort attrition conducted after adjustments were made to the attrition criteria to remove the need for parsing lab result values.
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