| Scope | DDI | MICA |
|---|---|---|
| Management Executive control, scientific leadership, funding, etc. |
Group Citation Purpose Abstract FundingInformation Archive Module Organization Individual Role (research, management, funding, etc.) Location Telephone |
Study name description website logo Investigators Contacts Instituions Documents Study Information recruitment targets ? selection criteria ? |
| Access How to obtain data and any restrictions on access |
Group/Subgroup/StudyUnit Archive Module AccessConditions AccessPermissions ConfidentialityStatement Restrictions LifecycleInformation |
StudyInformation Governance Data access |
| Sample Design and Procedures Population being sampled: Refreshment strategy; Replacement strategy; Potential errors |
Group ConceptualComponents Universe Concept DataCollection Methodology SamplingProcedure DeviationFromSampleDesign ActionToMinimizeLosses |
Study Information Biological samples collected |
| Geographic regions sampled |
Group Spatial Coverage |
|
| Periodicity Pattern of repeated surveys: Start/end dates important in all surveys, but intrinsic to analysis of longitudinal data |
DataCollection DataCollectionDate StartDate EndDate Cycle DataCollectionFrequency |
Study Information start year end year |
| Type Cohort, panel, repeated cross-section |
DataCollection TimeMethod |
Study Information Study design |
| Weighting How weights were developed; how to use weights |
DataCollection Weighting |
|
| Comparability across rounds Identify comparable items and degree of comparability |
Comparison Item Map Commonality Difference |
|
| Round/Cycle: Characteristics of the round |
Repeat from above, placing the information at the appropriate level (StudyUnit, or Subgroup, if using Group for entire project) Round identifier: StudyUnitID |
|
| Round/Cycle: Round identifier | StudyUnitID | |
| Round/Cycle: Mode How data were collected |
DataCollection ModeOfCollection |
|
| Round/Cycle: Collection Dates Date or range of dates for specific wave/round |
DataCollection DataCollectionDate StartDate EndDate Cycle DataCollectionFrequency |
|
| Round/Cycle: Geography Geographic regions sampled, if specific to wave |
StudyUnit/DataCollection/LogicalProduct Spatial Coverage |
|
| Instrument: Flow control and item ordering How respondents were routed through the instrument |
DataCollection QuestionConstruct ControlConstruct InterviewerInstructions |
|
| Question Granular elements of a question |
DataCollection QuestionItem QuestionText ConceptReference QuestionConstruct InterviewerInstructionsReference QuestionReference AnalysisUnit Description Label UniverseReference ResponseUnit |
|
| Data model: Datasets Persistent identifiers Variables containing time info: Round info, date of interview, etc. |
PhysicalInstance DataFileIdentification ConceptualComponent Concept(s) LogicalProduct VariableGroup(s) |
|
| Data model: Record Longitudinal relationships: Between data tables |
LogicalProduct DataRelationship LogicalRecord CaseIdentification Record Relationship |
|
| Data model: Variable Derived variable |
DataCollection GenerationInstruction SourceVariable |
|
| Literature references Publications related to the study; indicate specific relationship |
OtherMaterial Citation Relationship |
See http://www.ddialliance.org/sites/default/files/PresentingLongitudinalStudiesUsingDDIMetadata.pdf
http://dx.doi.org/10.3886/DDILongitudinal01
http://dx.doi.org/10.3886/DDILongitudinal02
http://dx.doi.org/10.3886/DDILongitudinal03
http://dx.doi.org/10.3886/DDILongitudinal04
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