data_structure
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data_structure [2021/02/19 12:19] trynke |
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| ===== WHO ===== | ===== WHO ===== | ||
| - | Each datapoint is collected for a specific participant. Each participant has certain characteristics, which are provided as [[default variables]] in your dataset. | + | Each datapoint is collected for a specific [[cohort|participant]]. Each participant has certain characteristics, which are provided as [[default variables]] in your dataset. |
| ===== WHAT ===== | ===== WHAT ===== | ||
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| * An **assessment** is the complete collection of data for a given project (see: [[general assessments]] and [[additional assessments]]). | * An **assessment** is the complete collection of data for a given project (see: [[general assessments]] and [[additional assessments]]). | ||
| * An **element** is a part of an assessment for which participants are separately invited and that can be pinpointed to one specific date. Each assessment has at least one element (and often more). For example, general assessment [[1A]] (baseline) for adults has 4 elements: visit 1, visit 2, questionnaire 1 and questionnaire 2. Additional assessment [[COVQ]] has many elements: one for each consecutive sub-questionnaire. | * An **element** is a part of an assessment for which participants are separately invited and that can be pinpointed to one specific date. Each assessment has at least one element (and often more). For example, general assessment [[1A]] (baseline) for adults has 4 elements: visit 1, visit 2, questionnaire 1 and questionnaire 2. Additional assessment [[COVQ]] has many elements: one for each consecutive sub-questionnaire. | ||
| - | * A **variant** is part of an element that contains a set of variables that is collected under a unique, coherent protocol. Significant changes to that protocol (i.e. the addition/removal/modification of variables, the method used for the measurement, new selection criteria) results in a new variant. Each element has at least one variant (and often more). Variant names are informative codes that will tell you about the context and uniqueness of the variant, as follows: assessment_element_number_description_agegroup_version. For example: 1a_q_1_paper_18-65_index. | + | * A **variant** is part of an element that contains a set of variables that is collected under a unique, coherent protocol. Significant changes to that protocol (i.e. the addition/removal/modification of variables, a new method used for the measurement, new selection criteria) results in a new variant. Each element has at least one variant (and often more). Variant names are informative codes that will tell you about the context and uniqueness of the variant, as follows: assessment_element_number_description_agegroup_version. For example: 1a_q_1_paper_18-65_index. |
data_structure.txt ยท Last modified: 2021/02/19 12:22 by trynke
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