Differences

This shows you the differences between two versions of the page.

--- data_structure [2021/02/19 11:20] – trynke
+++ data_structure [2025/02/05 13:49] (current) – external edit 127.0.0.1
@@ Line 11: / Line 11: @@
 Each datapoint is collected at a specific time and under a specific protocol. This information is structured as follows:
-  * 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]]). Each assessment has at least 1 element (and often more).
-  * 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. 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. Each element has at least 1 variant (and often more).
-  * 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.
+  * 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.
+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 (1a_q_1_paper_18-65_index).