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--- gecco_variables [2023/11/09 11:50] – [Table] laura
+++ gecco_variables [2026/04/14 10:04] (current) – simone
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 ====== GECCO variables (linkage) ======
+Below you find an overview of GECCO variables that can be requested through the [[https://data-catalogue.lifelines.nl/|Lifeline catalogue]].
+For more information and the condition for request, please see our page on [[environmental_exposure_linkage| environmental exposure]].
+Please note: Lifelines participants may have changed their home address during their participation to Lifelines (up to 15 changes are reported within the GECCO data).
+For example, the variables geccowalkability_startdate_all_l_1_01 and geccowalkability_enddate_all_l_1_01 provide the start date, respectively end date of the first known home address of a participant since 2006. If the date precedes 2006, this is because the participant has lived at the first known home address since that date. 2006 is chosen for the first address since Lifelines started collecting data in this year. For most participants, the baseline date is later though, so geccowalkability_startdate_all_l_1_01 and geccowalkability_enddate_all_l_1_01 do not necessarily correspond to the baseline address.
+geccowalkability_startdate_all_l_1_02 and geccowalkability_enddate_all_l_1_02 provide the start and end date of the second home address, and so on until the last known home address.
+To find the greenspace value for the address the participant lived in at baseline you should match startdate and enddate with the column 'date' in the baseline results file. For example, if the date in the results file lies between geccowalkability_startdate_all_l_1_03 and geccowalkability_enddate_all_l_1_03, you should take the value from gecco2012_greenspace_all_l_(buffersize)_03. Similar exercise should be done if you are interested in other assessments (e.g., 2A).
+* (code): All variables have the prefix //geccoYYYY// and have 15 versions.
 ===== Variables =====
-| **Label English**                                                                                                          | **Label Dutch**                                                                                                                                      | **Code**                          | **Assessment**  | **Age**  | **Subsection**            |
+| **Label English**                                                                                                          | **Label Dutch**                                                                                                                                      | **Code * **                          | **Assessment**  | **Age**  | **Subsection**            |
 | concentration of ammonia (nh3) in 2011 in μm per m3 (1000m2 resolution)                                                    | concentratie van ammoniak (nh3) in 2011 in μm per m3 (1000m2 resolutie)                                                                              | ammonia_all_l_1000_01             | sec             | all      | Air pollution (GECCO)     |
 | concentration of benzene (c6h6) in 2011 in ug per m3 (1000m2 resolution)                                                   | concentratie van benzeen (c6h6) in 2011 in μm per m3 (1000m2 resolutie)                                                                              | benzene_all_l_1000_01             | sec             | all      | Air pollution (GECCO)     |