====== 2A Questionnaire 2 ======

Adult and elderly Lifelines participants participating in the second [[general assessments|general assessment]] [[2A]] received two questionnaires, [[2A Questionnaire 1]] and 2A Questionnaire 2.\\
2A Q2 was followed by [[2A Visit 2]] after, on average, 17 days (SD: ± 36 days).\\
2A Q2 was followed by assessment [[2B]] after, on average, 20 months (SD: ± 4 months).\\
2A Q2 is procedurally equivalent to [[1A Questionnaire 2]] and [[3A Questionnaire 2]].\\ 
The average time between [[1A Questionnaire 2]] and 2A Q2 was 46 months (SD: ± 14 months).\\

Of all participants that filled out 2A Q2 (n = ~90,000), 30% of participants filled in a paper variant whereas 70% filled in a digital variant.

2A Q2 contained the following [[sections]] and subsections:

==== Demographics ====
  * [[Personal data]]

==== Diseases & symptoms ====
  * [[Allergies]]
  * [[Fatigue (CDC)]]
  * [[Functional bowel symptoms (Rome III)]]
  * [[Eye conditions (OQ)]]
  * [[Fatigue (general)]]
  * [[Fatigue (CIS)]]
  * [[Musculoskeletal symptoms]]
  * [[Musculoskeletal pain (WPI)]]
  * [[Respiratory problems (ELON)]]

==== Lifestyle & Environment ====  
  * [[Drug use]]
  * [[Informal care]]
  * [[Smoking & tobacco use]]

==== Nutrition ====
  * [[FFQ|Alcohol use (FFQ)]]
  
==== Physical State ====
  * [[Hair|Scalp hair]]