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stress_sum_scores [2021/08/30 17:36]
laura
stress_sum_scores [2021/08/31 12:49] (current)
simone [Calculations]
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 ====== Stress sum scores (LDI, LTE) ====== ====== Stress sum scores (LDI, LTE) ======
  
-Researchers from the [[https://​www.rug.nl/​staff/​l.schweren/​research|University Medical Center Groningen]] validated and created sum scores for questionnaire data on past-year stress exposure. More specifically the [[stress_ldi|Long-term Difficulties Inventory (LDI)]] and [[stress_lte|List of Threatening Experiences (LTE)]] for adult participants at [[1a_questionnaire_2|1A]],​ [[1B]], [[1C]], [[2a_questionnaire_1|2A]],​ and [[3a_questionnaire_2|3A]]. ([[sections]]:​ [[mental health]] ([[stress_ldi|LDI]],​ [[stress_lte|LTE]]) and [[secondary & linked variables]]).\\+Researchers from the [[https://​www.rug.nl/​staff/​l.schweren/​research|University Medical Center Groningen]] validated and created sum scores for questionnaire data on past-year stress exposure. More specifically the [[stress_ldi|Long-term Difficulties Inventory (LDI)]] and [[stress_lte|List of Threatening Experiences (LTE)]] for adult participants at [[1a_questionnaire_2|1A]],​ [[1B]], [[1C]], [[2a_questionnaire_1|2A]],​ and [[3a_questionnaire_2|3A]]. ([[sections]]:​ [[mental health]] ([[stress_ldi|LDI]],​ [[stress_lte|LTE]]) and [[secondary & linked variables]])\\
  
 The stress sum scores can be requested in the Lifelines catalogue or by mail (data@lifelines.nl).\\ The stress sum scores can be requested in the Lifelines catalogue or by mail (data@lifelines.nl).\\
 +\\
 ===== Background ===== ===== Background =====
-In the Lifelines questionnaires two stress exposure questionnaires are administered:​ (1) the [[stress_ldi|Long-term Difficulties Inventory (LDI)]], which measures long-term difficulties and focusses more on potential sources of chronic stress and how much the participant was affected by this type of stress; and (2) the [[stress_lte|List of Threatening Experiences (LTE)]] which  ​meaures ​more acute stressful life events and asks whether participants experienced such an event in the past year.\\ +In the Lifelines questionnaires two stress exposure questionnaires are administered:​ (1) the [[stress_ldi|Long-term Difficulties Inventory (LDI)]], which measures long-term difficulties and focusses more on potential sources of chronic stress and how much the participant was affected by this type of stress; and (2) the [[stress_lte|List of Threatening Experiences (LTE)]] which  ​measures ​more acute stressful life events and asks whether participants experienced such an event in the past year.\\ 
 +\\
 ===== Calculations===== ===== Calculations=====
 Before the researchers proceeded with the actual calculations,​ first the variables were recoded (0=not, 1=somewhat, 2=very much for LDI and 0=no, 1=yes for LTE).  Before the researchers proceeded with the actual calculations,​ first the variables were recoded (0=not, 1=somewhat, 2=very much for LDI and 0=no, 1=yes for LTE). 
  
 === Sum score === === Sum score ===
-After recoding, the sum scores are calculated by adding all LDI/LTE variables ​together. ​+After recoding, the sum scores are calculated by adding all LDI or LTE items together. ​
 Please note that in case one or more items are missing, **no** sum score is calculated. The missing item is not imputed because stressful life events are generally thought of as being random. Imputing the occurrence of a random event based on the occurrence of another random event is not theoretically sound. Please note that in case one or more items are missing, **no** sum score is calculated. The missing item is not imputed because stressful life events are generally thought of as being random. Imputing the occurrence of a random event based on the occurrence of another random event is not theoretically sound.
  
 === Suspicious scores === === Suspicious scores ===
-Finally, participants with suspiciosly ​high scores have been flagged. In other words, participants with 'very much' for each LDI item or '​yes'​ on each LTI item received such indication. Note that these subjects should not necessarily be excluded: these are very few cases suggesting they might actually ​represent the unfortunate few who went through all of these events in the past year.\\ +Finally, participants with suspiciously ​high scores have been flagged. In other words, participants with 'very much' for each LDI item or '​yes'​ on each LTI item received such indication. Note that these subjects should not necessarily be excluded: these are very few cases suggesting they might represent the unfortunate few who went through all of these events in the past year.\\ 
 +\\
 ===== Article ===== ===== Article =====
-  * ... \\+  * [[https://​doi.org/10.1016/j.clnu.2020.06.016| Schweren, L. J., Larsson, H., Vinke, P. C., Li, L., Kvalvik, L. G., Arias-Vasquez,​ A., ... & Hartman, C. A. (2021). Diet quality, stress and common mental health problems: A cohort study of 121,008 adults. Clinical Nutrition, 40(3), 901-906. https://​doi.org/​10.1016/​j.clnu.2020.06.016]]  
 +  * [[https://​doi.org/​10.1016/​j.bbi.2021.05.022|Mac Giollabhui, N., Alloy, L. B., Schweren, L. J., & Hartman, C. A. (2021). Investigating whether a combination of higher CRP and depression is differentially associated with worse executive functioning in a cohort of 43,896 adults. Brain, Behavior, and Immunity. https://​doi.org/​10.1016/​j.bbi.2021.05.022]]\\ 
 +\\
  
 ===== Variables ===== ===== Variables =====
-| **Label English** ​                                       | **Label Dutch** ​                                                 | **Code** ​                              ​| **Variable** ​ | **Assessment** ​            ​| **Age** ​ |+| **Label English** ​                                                                       | **Label Dutch** ​                                                                                               | **Code** ​             | **Variable** ​ | **Assessment** ​                                                                                  ​| **Age**  ​
 +| Total amount of stress from long-term/​chronic stressors experienced by the participant. ​ | Totale hoeveelheid stress van lange-termijn/​chronische stressoren ​                                             | ldi_sumscore_adu_c_1 ​ | LDI_sum ​      | [[1a_questionnaire_2|1A]],​ [[1B]], [[1C]], [[2a_questionnaire_1|2A]],​ [[3a_questionnaire_2|3A]] ​ | 18+      | 
 +| Subject answered “very much” to every item on the LDI list                               | Deelnemer heeft "​zeer"​ geantwoord op elk item van de LDI vragenlijst ​                                          | ldi_flag_adu_c_1 ​     | LDI_flag ​     | [[1a_questionnaire_2|1A]],​ [[1B]], [[1C]], [[2a_questionnaire_1|2A]],​ [[3a_questionnaire_2|3A]] ​ | 18+      | 
 +| Total number of stressful life events that happened to participant in the past year.     | Totaal aantal stressvolle gebeurtenissen die in het afgelopen jaar plaatsvonden in het leven van de deelnemer ​ | lte_sumscore_adu_c_1 ​ | LTE_sum ​      | [[1a_questionnaire_2|1A]],​ [[1B]], [[1C]], [[2a_questionnaire_1|2A]],​ [[3a_questionnaire_2|3A]] ​ | 18+      | 
 +| Subject answered “yes” to every item on the LTE list                                     | Deelnemer heeft "​ja"​ geantwoord op elk item van de LTE vragenlijst ​                                            | lte_flag_adu_c_1 ​     | LTE_flag ​     | [[1a_questionnaire_2|1A]],​ [[1B]], [[1C]], [[2a_questionnaire_1|2A]],​ [[3a_questionnaire_2|3A]] ​ | 18+      ​|
stress_sum_scores.1630337797.txt.gz · Last modified: 2021/08/30 17:36 by laura