====== 1A Questionnaire 1 ======

Adult and elderly Lifelines participants participating in general assessment [[1A]] (“Baseline”) received two questionnaires on paper, 1A Questionnaire 1 and [[1A Questionnaire 2]].\\
1A Q1 was followed by [[1A Visit 1]] after, on average, 21 days (SD: ± 33 days).\\
1A Q1 was followed by [[1A Questionnaire 2]] after, on average, 53 days (SD: ± 61 days).\\
1A Q1 is procedurally equivalent to [[2A Questionnaire 1]] and [[3A Questionnaire 1]].\\ 
The average time between 1A Q1 and [[2A Questionnaire 1]] was 46 months (SD: ± 14 months).\\

All questionnaires were filled in on paper:
  * 18-64 years old: n = ~140,000
  * 65+ years old: n = ~10,000

1A Q1 contained the following [[sections]] and subsections:

==== Demographics ====
  * [[Education]]
  * [[Personal data]]
  * [[Family composition]]
  * [[Family deaths]]
  * [[Household composition]]
  * [[Income]]
  * [[Nationality & ethnicity]]
  * [[Profession]]
  * [[Occupational history]]
  * [[Employment status]]

==== Diseases & Symptoms ====
  * [[Acne]]
  * [[Allergies]]
  * [[Blood disorders]]
  * [[Cancer]]
  * [[Cardiovascular diseases]]
  * [[Cardiovascular symptoms]]
  * [[Diabetes]]
  * [[Digestive system diseases]]
  * [[Diseases (other)]]
  * [[Ear conditions]]
  * [[Eye conditions (general)]]
  * [[Fatigue (general)]]
  * [[Kidney & bladder diseases]]
  * [[Mental illnesses]]
  * [[Musculoskeletal conditions]]
  * [[Musculoskeletal symptoms]]
  * [[Neurological disorders]]
  * [[Respiratory diseases]]
  * [[Respiratory problems (general)]]
  * [[Skin conditions]]
  * [[Symptoms (SCL-90)]]

==== Elderly ====  
//NB: Only elderly participants (65+) were asked these questions//
  * [[Frailty (GFI)]]
  * [[Independence]]
  * [[Living situation]]
  * [[Self-assessment (Intermed)]]

==== Family Health ====  
  * [[Familial cardiovascular disease]]
  * [[Familial chronic fatigue syndrome]]

==== Lifestyle & Environment ====  
  * [[Electronic device use]]
  * [[Hobbies & activities]]
  * [[Home environment (general)]]
  * [[Informal care]]
  * [[Sleep (general)]]
  * [[Smoking & tobacco use]]
  * [[Values, beliefs, priorities]]
  * [[Volunteer work (general)]]

==== Medical Treatment ====  
  * [[Hospitalization]]
  * [[Medication]]
  * [[Surgery]]
  * [[Treatment (general)]]

==== Mental Health ==== 
  * [[Work psychology (general)]]
  * [[Personality (ASI)]]
  * [[Quality of Life (RAND)]]
  * [[Social functioning (SPF-IL)]]

==== Reproduction & Development ====
  * [[Contraception]]
  * [[Gynecological surgery]]
  * [[Menstruation]]
  * [[Pregnancy outcomes]] 

==== Wellbeing & Subjective health ====
  * [[Life satisfaction (general)]]
  * [[Work absence]]