Label number
Family number
Participant's age at time of study
Participant's age at time of study - classes
Gender at birth
Sampling season
Diastole blood pressure (average of 5 measurements)
Systole blood pressure (average of 5 measurements)
Heart rate (average of 5 measurements)
Waist circumference (cm) - only if measured by field workers
Height of participant (cm) on examination
Weight (kg) participant on study
Ratio of waist circumference and length - only if measured by field workers
Risk of abdominal obesity - only if measured by field workers
BMI participant in research
Participant's BMI Z-score on examination, standardized for age and gender (WHO reference)
BMI Z score of the participant in classes
Do you smoke tobacco?
Do you smoke tobacco? (binary)
Do you smoke an electronic cigarette?
Do you smoke an electronic cigarette? (binary)
Do you smoke hookah?
Do you smoke (tobacco/electronic cigarette/hookah)?
Smoked tobacco in the past 3 days?
Last 3 days in a room where tobacco was smoked?
Smoked an electronic cigarette in the past 3 days?
Smoked hookah in the past 3 days?
Smoking tobacco, electronic cigarette or hookah in the past 3 days
past 3 days of passive smoking of tobacco, electronic cigarette or hookah
Do you sometimes drink alcoholic beverages?
Drug use
Minutes in heavy traffic over the past three days, on foot or by bike
Minutes in heavy traffic over the past three days, on foot or by bike
In room with fireplace, coal or wood stove the past three days
Fish or seafood eaten in the past three days
Rice eaten in the past three days
Used vitamin or mineral supplement in the past 14 days
Used omega-3 fatty acids supplement in the past 14 days
Been sick in the past 14 days
Used medicine in the past 14 days
Fever in the past 14 days
Past 14 days respiratory infection
Infection in the past 14 days
Currently receiving growth hormone treatment
Training finality
Passive smoking: how often have you smoked in a room at home?
Passive smoking: how often have you smoked in a room elsewhere?
passive smoking tobacco at home and/or elsewhere
self-smoking (tobacco) and/or passive smoking at home and/or elsewhere
self-smoking (tobacco, electronic cigarette, or hookah) and/or second-hand smoke at home and/or elsewhere
How many times a week are you actively involved in sports (such as football, cycling, etc.) so that you sweat or are out of breath?
asthma diagnosed by doctor once: Have you ever had asthma diagnosed by a doctor?
Wheezing or whistling in your chest, with shortness of breath, not a cold - last 12 months
Asthma - last 12 months
Asthma - ever
Medication for asthma (puffers, aerosols, tablets, ...) last 12 months
Allergic rhinitis: nasal allergy - ever
Medication for eczema - last 12 months
Allergy to foods, drugs or insect bites - last 5 years
Allergy to food - last 5 years
Allergy ever to drugs - last 5 years
Allergy ever to insect bites - last 5 years
Allergy to metal, personal care products, household and maintenance products - last 5 years
Allergy to metal - last 5 years
Allergy to personal care products - last 5 years
Allergy to household and maintenance products - last 5 years
Allergy to care, household or maintenance products - last 5 years
Allergy to food, medicines, insect bites, metal, personal care products, household and maintenance products - last 5 years
Allergy to animals - last 5 years
Problems with eyes for the last three months
Suffering from problems with nose for the last three months
Suffering from throat problems for the last three months
Headaches for the last three months
Suffering from memory problems in the last three months
Last three months I have suffered from dizziness
Last three months I suffer from tired, sleepy
Heavy head for the last three months
General Health Questionnaire - 8 questions
SDQ Emotional problem score
SDQ Conduct problem score
SDQ Hyperactivity score
SDQ Peer problem score
SDQ Prosocial scale score
SDQ Total difficulties score
SDQ Total difficulties score - original 3 band classes
SDQ Total difficulties score - 4 band classes
SDQ Emotional problem score- original 3 band classes
SDQ Emotional problem score - 4 band classes
SDQ Conduct problem score - original 3 band classes
SDQ Conduct problem score - 4 band classes
SDQ Hyperactivity score - original 3 band classes
SDQ Hyperactivity score - 4 band classes
SDQ Peer problem score - original 3 band classes
SDQ Peer problem score - 4 band classes
SDQ Prosocial scale score - original 3 band classes
SDQ Prosocial scale score - 4 band classes
How many times with a lot of life in the past four weeks
How often full of energy in the past four weeks
How many times exhausted in the past four weeks
How often tired in the past four weeks
Vitality score (mental health indicator)
How happy all things considered? Binary
Length growth participant - growth spurt
Height growth participant - growth spurt, boys
Height growth participant - growth spurt, girls
Participant's body hair growth (except on head)
Growth body hair participant (except on head), boys
Growth of body hair participant (except on head), girls
Skin change participant
Skin change participant, boys
Skin change participant, girls
Participant's voice change
Facial hair participant (boys)
Breast development participant (girls)
Pubertal development scale (boys)
Pubertal development scale (boys) in 5 categories
Pubertal development scale (boys) in 3 categories
Pubertal development scale (boys) in 2 categories
Pubertal development scale (boys) standardized for age in 2 categories
Pubertal development scale (girls)
Pubertal development scale (girls) in 5 categories
Pubertal development scale (girls) in 3 categories
Pubertal development scale (girls) in 2 categories
Pubertal development scale (girls) standardized for age in 2 categories
Girl already has menstruation
Does girl have regular periods?
Age of first period (for girls with periods)
Late first periods (after 13.5 years) - for girls with periods and girls who do not menstruate at 13.5 years
Age of first menstruation - for girls with periods and girls who do not yet menstruate at 13.5 years (cannot be calculated for girls under 13.5 who menstruate but do not know age)
Nationality participant at birth
Nationality Participant at birth in categories
Current nationality participant
Current nationality participant in categories
Number of family members
Number of family members - class
Number of family members on whom the equivalent income is calculated
Highest education parent 1 of the participant (ISCED classification)
Highest education parent 2 of the participant (ISCED classification)
Highest education household - parent 1 and parent 2 (these are not necessarily the biological parents)
nationality at birth of parent 1 of the participant
Nationality at birth of parent 1 of the participant in Categroiën
nationality at birth of parent 2 of the participant
nationality at birth of parent 2 of the participant in categories
Making ends meet (subjective): How easy or difficult is it for you to make ends meet with your household's total income per month?
Equivalent household income
Equivalised household income - categories
nationality(ies) of the participant, parent 1 of the participant, and parent 2 of the participant
nationality(ies) of the participant, parent 1 of the participant, and parent 2 of the participant in 3 categories
nationality(ies) of the participant, parent 1 of the participant, and parent 2 of the participant in 2 categories
nationality(ies) of the participant, the biological mother of the participant, and the biological father of the participant
nationality(ies) of the participant, the biological mother of the participant, and the biological father of the participant in 3 categories
nationality(ies) of the participant, the biological mother of the participant, and the biological father of the participant in 2 categories
Type of property
Year of construction of the house in categories
Year of construction house binary
Smoked mother during pregnancy
Did mother drink alcohol during pregnancy
Mother's age at childbirth.
How many children are participants?
Child birth weight in categories
Birth weight child light
Preterm birth (< 37 weeks)
Was the child breastfed?
infections (all) - last 12 months
respiratory infections - last 12 months
Prevention of familial asthma
Prevention of family hay fever
Prevention of familial eczema
Diagnosis of thyroid problems
Diagnosis of diabetes
Diagnosis of kidney disease
Diagnosis of ADHD
Diagnosis of ASD
Diagnosis of allergy
Means of transport to go to school
Duration of travel (there and back) to school (in 4 categories)
Duration of travel (there and back) to school (in 3 categories)
How often in free time outside in nature or terrain with fallow greenery
How often do you do the following: Wash hands
How often do you do the following: hand washing (binary)
How often do you do the following: brush your teeth
How often do you do the following: wash hair
How often do you do the following: take a bath/shower
How often do you do the following: change clothes
Do you sometimes bite your nails?
Is family owner of home
How many meters is there between your home and the nearest street?
Have there been any road works in the street where you live in the past 3 months?
Renovation work on the house in the past 12 months?
What flooring do you have in the following rooms? Tiles
What flooring do you have in the following rooms? Carpet
What flooring do you have in the following rooms? Loose carpets
What flooring do you have in the following rooms? Parquet
What flooring do you have in the following rooms? Planks
Have you changed anything about the decoration of your home to reduce the amount of dust? (e.g. carpet removed)
How many times a week do you carry out the following activities: Dusting the living room with a dry cloth
How many times a week do you carry out the following activities: Removing dust in the living room with a wet cloth
How many times a week do you perform the following activities: knock out the living room rug
How many times a week do you perform the following activities: sweeping or turning the living room?
How many times a week do you perform the following activities: vacuuming the living room
How many times a week do you perform the following activities: mopping living room
How many times a week do you perform the following activities: kitchen cleaning
How many times a week do you perform the following activities: bathroom cleaning
How many times a week do you carry out the following activities: sweeping the terrace
How many times a week do you carry out the following activities: Hose down the terrace
How often are the following products used indoors? Insect killers
How often are the following products used indoors? Cleaning products with bleaches
How often are the following products used indoors? Paint, glue, varnish
How often are the following products used indoors? Antifungal products
Heating via stove (wood, gas, oil,...)  or fireplace ?
Type of stove used as heating
Frequency of use of stove or fireplace
Do you ever burn outside, e.g. an open fire or a fire pit?
Vehicle in the house and direct connecting door between the house and the room with the vehicle?
Is there currently smoking in the house?
Is there smoking in the house
Are there pets inside your home?
Cat and or dog in the house?
Ventilation in living room or bedroom manual
Ventilation in living room or bedroom manual (binary)
Ventilation in living room or bedroom via grilles
Ventilation in living room or bedroom via grilles (binary)
Ventilation in living room or bedroom mechanical
Ventilation in living room or bedroom mechanical (binary)
Ventilation of the living room by opening windows and/or exterior doors
Ventilation of the bedroom by opening windows and/or external doors
Moisture problem in the house?
Do you suffer from mold formation in the house?
Sometimes draughts in the house?
Do you have a garden or terrace?
Garden/terrace with tiles
Garden/terrace with grass
Garden/terrace with vegetable garden
Garden/terrace with bare ground
Groundwater well present in the garden
Depth of groundwater well
What is/was the well water used for?
Ever used water from well for feeding, spraying, hygiene, dishwasher,..
Now use of water from well for feeding, spraying, hygiene, dishwasher,..
What footwear does your family mainly wear in the home?
Do the family members wipe their feet or shoes (on a doormat, among other things) when entering the house?
How many weeks was child breastfed in classes
Have road works been carried out in the street of the house in the past 14 days?
Have you eaten fruit or vegetables from your own garden in the past 3 days?
Have you eaten eggs from your own chickens in the past few days?
Consumption of eggs over the past 12 months
Consumption of eggs in the past 12 months (bin)
Consumption of organ meat in the past 12 months
Consumption of meat with a hot meal over the past 12 months
Consumption of wild over the past 12 months
Consumption of charcuterie over the past 12 months
Fish consumption in the past 12 months
Consumption of smoked fish in the past 12 months
Consumption of smoked fish in the past 12 months (bin)
Consumption of fish with a hot meal over the past 12 months
Consumption of fish with a hot meal in the past 12 months (bin)
Shellfish consumption over the past 12 months
Shellfish consumption over the past 12 months
Consumption of potatoes over the past 12 months
Consumption of vegetables in the past 12 months
Consumption of leafy vegetables in the past 12 months
Mushroom consumption in the past 12 months
Consumption of dried fruit in the past 12 months
Fruit consumption over the past 12 months
Consumption of bread in the past 12 months
Consumption of breakfast cereals and meusli over the past 12 months
Rice consumption in the past 12 months
Rice consumption in the past 12 months (binary)
Consumption of nuts and seeds over the past 12 months
Consumption of cheese over the past 12 months
Consumption of milk and milk products over the past 12 months
Chocolate consumption over the past 12 months
Tofu consumption in the past 12 months
Consumption of other meat substitutes in the past 12 months
Consumption of algae in the past 12 months
Fast food consumption over the past 12 months
What kind of water do you drink: water from the tap
What kind of water do you drink: bottled water
Do you have a vegetable garden where you grow vegetables, fruit or other food?
How big is your vegetable garden?
How often did the young person eat fruit and vegetables from their own garden during the past 3 months? Small fruits
How often did the young person eat fruit and vegetables from their own garden during the past 3 months? Vegetables from our own garden
How often did the young person eat fruit and vegetables from their own garden during the past 3 months? Lettuce + spinach + other leafy vegetables from your own garden
How often did the young person eat fruit and vegetables from their own garden during the past 3 months? Tomatoes + cucumbers + other fruiting vegetables from your own garden
How often did the young person eat fruit and vegetables from their own garden during the past 3 months? Leeks + other stem crops
How often did the young person eat fruit and vegetables from their own garden during the past 3 months? Beans + peas
Does the young person sometimes eat fruit and/or vegetables grown by others in the defined research area?
How often did the young person eat fruit and vegetables from their own garden or others from the study area during the past 3 months? Small fruit + orchard fruit
How often did the young person eat fruit and vegetables from their own garden or others from the study area during the past 3 months? Vegetables
How often did the young person eat fruit and vegetables from their own garden or others from the study area during the past 3 months? Lettuce + spinach + other leafy greens
How often did the young person eat fruit and vegetables from their own garden or others from the study area during the past 3 months? Tomato + cucumber + other fruiting vegetables
How often did the young person eat fruit and vegetables from their own garden or others from the study area during the past 3 months? Leeks + other stem vegetables
How often did the young person eat fruit and vegetables from their own garden or others from the study area during the past 3 months? Leeks + other stem vegetables (binary)
How often did the young person eat fruit and vegetables from their own garden or others from the study area during the past 3 months? Beans + peas
Does the young person eat eggs from their own chickens?
Does the young person sometimes eat eggs that you get from neighbours, friends or family who live in the demarcated research area?
Does the young person sometimes eat eggs from their own chickens or those you get from neighbours, friends or family who live in the demarcated research area?
How often did the eggs that the young person ate during the past 3 months come from your own chickens or were received/bought from neighbours, friends, family or local growers living in the demarcated research area?
How many eggs from chickens from the defined study area does the young person eat on average per week (including preparations such as cake and mayonnaise)?
Does the young person drink tea that was prepared in a traditional metal teapot?
Does the young person drink tea that was prepared in a traditional metal teapot? (binary)
Do you eat the younger dishes that were prepared in ceramic pots or bowls (e.g. tagine, ...)?
Do you eat the younger dishes that were prepared in ceramic pots or bowls (e.g. tagine, ...)? (binary)
The wind direction relative to Umicore (participants SW forced on missing due to low number)