Fedko et al., Measurement and genetic architecture of lifetime depression in the Netherlands as assessed by LIDAS (Lifetime Depression Assessment Self-report). Psychol Med. 2022 Feb;51(8):1-10

• Fedko et al. Measurement and genetic architecture of lifetime depression in the Netherlands as assessed by LIDAS (Lifetime Depression Assessment Self-report). Psychol Med. 2020 Jan;51(8): 1-10

When the DEAQ data has been used in your research, you will have to include the following reference:

• van Loo et al., The structure of the symptoms of major depression: Factor analysis of a lifetime worst episode of depressive symptoms in a large general population sample. J Affect Disord 2022; 307: 115-124

===== Subcohort =====

• For DEPQ (2016), the LIDAS was sent to all adult participants with a known e-mail address within the GWAS subcohort (n=~10.000). ~5500 participants (50%) filled in the questionnaire.
  
• For DEAQ (2018), the LIDAS plus additional questions (mostly regarding lifetime anxiety) was sent to all adult participants with a known e-mail address in the entire cohort (n=133.000). ~43.500 participants (36%) filled in the questionnaire.

===== Variables ===== DEPQ consisted of variables in the following subsections:

• Depression (LIDAS) → note that for DEPQ, the original LIDAS was used
• Smoking & tobacco use
• Education
• Anthropometry (self-reported)

DEAQ consisted of variables in the following subsections:

• Depression (LIDAS) → note that for DEAQ, the original LIDAS was extended with various additional depression- and anxiety-related questions
• Smoking & tobacco use
• Education
• Anthropometry (self-reported)
• Stress (LTE)

Note that several LIDAS variables can also be found under the subsections Mental illnesses, Familial mental illnesses, Physical activity (general), Smoking & tobacco use, Medication, and Treatment (general). ==== Funding==== This project was funded by the Dutch research infrastructure for biobanking (BBMRI-NL) as Rainbow project Phenomics 2.0 – proof of principle for major depressive disorder (RP-12). ==== Publications using DEPQ/DEAQ data ====

• Bot et al., Validity of LIDAS (LIfetime Depression Assessment Self-report): a self-report online assessment of lifetime major depressive disorder. Psychol Med. 2017 Jan;47(2):279-289)) ((Fedko et al., Measurement and genetic architecture of lifetime depression in the Netherlands as assessed by LIDAS (Lifetime Depression Assessment Self-report). Psychol Med. 2022 Feb;51(8):1-10 → please cite this paper when using the LIDAS data
• Fedko et al. Measurement and genetic architecture of lifetime depression in the Netherlands as assessed by LIDAS (Lifetime Depression Assessment Self-report). Psychol Med. 2020 Jan;51(8): 1-10 → please cite this paper when using the LIDAS data
• van Loo et al., The structure of the symptoms of major depression: Factor analysis of a lifetime worst episode of depressive symptoms in a large general population sample. J Affect Disord 2022; 307: 115-124 → please cite this paper when using the DEAQ data
• Vreijling et al. Sociodemographic, lifestyle and clinical characteristics of energy-related depression symptoms: A pooled analysis of 13,965 depressed cases in 8 Dutch cohorts. Journal of Affective Disorders 2023; 323: 1-9