1=man; 2=female; 3=other; 4=I don't want to answer
1=always or most of the time; 2=half the time or less; 3=only on weekends or holidays; 4=almost never
1=ASO; 2=TSO; 3=BSO; 4=KSO; 5=BuSo; 6=I don't know
1=flow; 2=double finality; 3=labour market; 4=I don't know
1=Language and Culture; 2=VOTE; 3=Art and Creation; 4=Agriculture and Horticulture; 5= Economics and Organization; 6=Society and Welfare; 7=Sports; 8=Food and catering; 9=I don't know; 10=Other
1=3 or more times a week; 2=1 or 2 weeks per week; 3=never or rarely
1=almost never; 2=occasionally; 3=several times a month or weekly; 4=several times a week or daily
1=never; 2=occasionally; 3=weekly; 4=several times a week
1=never; 2=1-3x / month; 3=1-3x / week; 4=4-6x / week; 5=1x / day; 6=2 or more x / day
1=No; 2=Yes, I don't eat meat; 3=Yes, I don't eat meat and fish; 4=Yes, I do not eat animal products (meat, fish, eggs, milk, cheese, ...); 5=Yes, I eat lactose-free; 6=Yes, I eat gluten-free; 7=Yes, I do intermittent fasting; 8=Yes, other, namely
1=Not yet in the growth spurt; 2=The growth spurt has just begun; 3= In full growth spurt; 4=The growth spurt seems to be behind us; 5=I don't know
1=My body hair has not started to grow yet; 2=My body hair has just started to grow; 3=My body hair is growing rapidly; 4=The growth of my body hair seems to be completely behind me; 5=I don't know
1=My skin is not changing yet; 2=My skin is just starting to change; 3=My skin is changing a lot; 4=The changes to my skin seem to be behind me; 5=I don't know
1=My voice is not changing yet; 2=My voice is changing; 3=My voice is changing a lot; 4=The changes to my voice seem to be behind me; 5=I don't know
1=My facial hair has not started to grow yet; 2=My facial hair has just started to grow; 3=My facial hair is growing rapidly; 4=The hair growth on my face seems to be complete; 5=I don't know
1=My breasts have not started to grow yet; 2=My breasts have just started to grow; 3=My breasts are growing rapidly; 4=The growth of my breasts seems to be complete; 5=I don't know
1=I don't know my menstrual cycle because of contraception (pill, hormonal IUD, implant, etc.); 2=I menstruate monthly (regularly); 3=I menstruate, but not monthly (irregularly); 4=I do not menstruate or menstruate irregularly because of pregnancy or breastfeeding
1=Yes, I am well informed; 2=Yes, but I don't know much about it; 3=No
1=not worried at all; 2=not worried; 3=worried; 4=very worried
1=It gives me stress; 2=It scares me; 3=It makes me angry; 4=It makes me gloomy; 5=It makes me sad; 6=It makes me worry; 7=I don't care; 8=None of the above
1=strongly disagree; 2=rather disagree; 3=neither agree nor disagree; 4=rather agree; 5=Totally agree; 6=I don't know
1=very satisfied; 2=rather satisfied; 3= neither satisfied nor dissatisfied; 4=rather dissatisfied; 5=very dissatisfied
1=very possible; 2=best possible; 3=more or less possible; 4=little or not possible; 5=totally impossible
1=I am already doing this; 2=I want to do this, even if it takes more effort; 3=I want to do this, but it shouldn't cost me any effort; 4=I would like to, but this is not feasible for me; 5=I'm really not going to do this; 6=This does not apply to me
1=I don't know; 2=at the same address as the current address of the young person; 3=at a different address
1=I don't know; 2=at the same address as at the birth of the young person; 3=at a different address
1=biological mother; 2=biological father; 3=another person
1=biological mother; 2=biological father; 3=another person; 4=none, this is a single-parent family
1=no diploma; 2=primary education; 3=lower secondary education or secondary education of the 1st or 2nd grade; 4=Higher secondary education or secondary education of the 3rd grade; 5=Post-secondary non-higher education (4th grade, 7th year, entrepreneurial training,...); 6=Higher education of the short type (A1), professional bachelor; 7=Long-term college education, master's degree at a university college; 8=Academic bachelor (college or university); 9=university education, licentiate, engineer or master; 10=doctorate with dissertation; 11=other diploma
1=very difficult; 2=difficult; 3= you manage to make ends meet; 4= manage to get around comfortably; 5=I don't know
1=occasionally; 2=every week; 3=every day; 4=I don't know (anymore)
1=1st child; 2=2nd child; 3=3rd child; 4=other; 5=I don't know
1=no; 2=yes, less than a month; 3=yes, 1-6 months; 4=yes, longer than 6 months; 5=I don't know
1=never; 2=at least 1 time; 3=more than 1x/year but less than 1x/month; 4=at least 1x/month
1=yes, the family owns the house; 2=no, it is a private rental property; 3=no, it is a social rental home; 4=I don't know
1=no; 2= in the past; 3=yes, occasionally (less than weekly); 4=yes, once a week; 5=yes, several times a week; 6=yes, daily
1=never; 2=less than daily; 3= daily short-term ventilation; 4= open daily for a long time (e.g. half or full day windows/doors open or in tilt position; 5= opening windows is not possible
1=never; 2=occasionally; 3=(almost) weekly in certain seasons; 4=(almost) daily in certain seasons; 5=(almost) weekly all year round; 6=(almost) daily all year round; 7=I don't know
0=no; 1=yes, all cookware; 2=yes, part of the cookware; 3=I don't know
1=never; 2=occasionally; 3=weekly; 4=several times a week to daily; 5=I don't know
1=never; 2=occasionally; 3=weekly; 4=several times a week to daily
1=never had; 2=no, not had it since the PFAS No-regret measures; 3=yes, especially in planters; 4=yes, especially in open ground
1=no, never had; 2=no, it used to be; 3=yes, we have a compost heap
1=yes; 2= once had, but not anymore; 3=Never had
1=less than 10 meters; 2=10-30 meters; 3=31-100 meters; 4=more than 100 meters deep; 5=I don't know
1=no; 2=yes, already heard of it; 3=yes, I have already consulted the website
1=no, we have never had chickens; 2= in the past, already stopped before the no-regret measures were announced; 3= used to be, stopped because of the announced no-regret measures in June 2021; 4= used to be, stopped because of the general communication of the blood test among 800 local residents in October 2021; 5=yes, still
1=no, never did; 2= in the past, already stopped before the no-regret measures were announced; 3= used to be, stopped because of the announced no-regret measures in June 2021; 4= used to be, stopped because of the general communication of the blood test among 800 local residents in October 2021; 5=yes, still
1= eggs from neighbours, friends or family in the demarcated zone; 2=eggs from local farmers in the demarcated zone; 3=I don't know
1=none; 2=less than a fourth; 3=between a fourth and a half; 4=between half and three quarters; 5=more than three-quarters; 6=always
1=never; 2=1-3x/month; 3=1-3x/week; 4=4-6x/week; 5=1x/day; 6=2 or more x/day
1=never; 2=less than 1x per week; 3=1-3 x/week; 4=4-6x/week; 5=7x/week; 6=I don't know
1=no, never; 2=yes, fruit and/or vegetables from neighbours, friends or family in the demarcated zone; 3=yes, fruit and/or vegetables from local farmers in the demarcated zone; 4=I don't know
1=never; 2=rarely (less than half); 3=often (about half or more); 4=(almost) always
1=never; 2=occasionally; 3=weekly; 4=several days a week to daily
1=No, I have never smoked or ever once; 2=Yes, I smoke less than once a month; 3=Yes, I smoke at least once a month, but not every week; 4=Yes, I smoke at least once a week, but not every day; 5=Yes, I smoke every day
1=daily; 2=4-6 times a week; 3=2-3 times a week; 4=1 time a week; 5=rarely; 6=never
1=No, I have never smoked electronic cigarettes or ever once; 2=Yes, I smoke electronic cigarettes less than 1 time a month; 3=Yes, I smoke electronic cigarettes at least once a month, but not every week; 4=Yes, I smoke electronic cigarettes at least once a week, but not every day; 5=Yes, I smoke electronic cigarettes every day
1=No, I have never smoked hookah or once once; 2=Yes, I smoke hookah less than 1 time a month; 3=Yes, I smoke hookah at least once a month, but not every week; 4=Yes, I smoke hookah at least once a week, but not every day; 5=Yes, I smoke hookah every day
1=No, I have never drunk alcohol or once once; 2=Yes, less than 1 time per month; 3=Yes, at least once a month, but not every week; 4=Yes, at least once a week, but not every day; 5=Yes, every day
0=no; 1=complete (at least AB1, AB2, AS1, AS2, AS3 and AS4 (boys only)); 2=incomplete
0=no; 1=complete (at least AU1 and AU3); 2=incomplete (only AU1 or AU3)
0=Belgian origin; 1=EU - origin; 2=non-EU - origin
0=never or rarely; 1=1-2 times a week; 2=3 or more times a week
0=almost never; 1=occasionally; 2=several times a month or weekly; 3=several times a week or daily
0=never; 1=occasionally; 2=weekly or more
0=never; 1=occasionally; 2=weekly; 3=several times a week
1=up to 3 times a month; 2=1-3 times a week; 3=at least 4 times a week
1=up to 3 times a week; 2=4-6 times a week; 3=at least 1 time a day
1=never; 2=less than weekly; 3=weekly or more often
1=up to 6 times a week; 2=1 time a day; 3=several times a day
1=never; 2=1-3 times a month; 3=1-6 times a week; 4=at least 1 time a day
1=up to 3 times a week; 2=4-6 times a week; 3=1 time a day; 4=several times a day
0=not yet or just started; 2= fully engaged; 3=behind the back
0=not yet or just started; 2= in full swing or behind us
1=prepubertal; 2=early pubertal; 3=midpubertal; 4=late pubertal; 5=postpubertal
A boy who is older than 11.65 years must have reached stage 2. If yes=1 If not 0;;							A boy who is older than 12.95 years must have reached stage 3. If yes=1 If not 0;;							A boy older than 13.9 years must have reached stage 4. If yes=1 If not 0;;							A boy who is older than 15.25 years must have reached stage 5. If yes=1 If not 0
A girl older than 10.85 years must have reached stage 2. If yes=1 If not 0;;								A girl who is older than 11.85 years must have reached stage 3. If yes=1 If not 0;;								A girl older than 12.75 years must have reached stage 4. If yes=1 If not 0;;								A girl older than 14.65 years must have reached stage 5. If yes=1 If not 0
0=no, not even menstruation; 1=yes, irregular periods; 2=yes, regular periods
0=no (menarche <13.5 years or age of menarche unknown but already menstrual and younger than 13.5);1=yes (menarche >:13.5 years, or no menarche yet and older than 13.5y)
1=<:12.25 years; 2=12.26- 13.49 years; 3=>:13.5 years or no menarche yet and older >=13.5y
0= since birth at the same address; 1= at a different address since birth; 2= at several other addresses since birth
0= in the field of study; 1= not lived in the study area for less than one year; 2=not lived in the study area for at least one year
0= in the field of study; 1= not lived in the study area for less than one year; 2=1-4 years not lived in the study area; 3= not lived in the study area for at least four years
0=<:15 years; 1=15-25 years; 2=more than 25 years
1=low education; 2=medium education; 3=high education
0=Belgian origin; 1=EU origin; 2=non-EU origin
0=very difficult; 1=difficult; 2= manages to make ends meet; 3=manage to live comfortably
1=very difficult to difficult; 2= manages to make ends meet; 3=manage to live comfortably
1=<10 kilos; 2=10-12 kilos; 3=13-15 kilos; 4=16 kilos or more
0=no breastfeeding; 1=less than a month; 2=1 to 6 months; 3 longer than 6 months
0=no no antibiotics (or no breastfeeding); 1=yes
0=never; 1=at least once, but less than monthly; 2=more than once a year to monthly
0=no (tenant of private or social housing); 1=yes
0=no or less than weekly; 1=yes, weekly or more often
0=no stove or fireplace; 1=closed system (wood pellets, fuel oil, fuel oil, gas stove); 1=open system (wood stove, fireplace or coal stove)
1=only metal water pipes; 2=only plastic water pipes; 3=metal and plastic water pipes
0=nowhere; 1=one of the two rooms; 2=both rooms
0=nowhere; 1=one of the two rooms or in both rooms
0=no (never or less than daily); 1=yes daily short-lived; 2=yes daily long-term
0=nowhere; 1= parquet somewhere; 2=parquet everywhere
0=nowhere; 1=laminate somewhere; 2=laminate everywhere
0=nowhere; 1=tiles somewhere; 2=tiles everywhere
0=no wallpaper anywhere; 1=wallpaper somewhere, not washable; 2=wallpaper somewhere, washable; 3=wallpaper everywhere, washable
0=nowhere; 1= dyed somewhere, not washable; 2= dyed somewhere, washable; 3=Dyed throughout, washable
0=never; 1=occasionally; 2=weekly in certain seasons to daily throughout the year
0=no non-stick cookware; 1= cookware with non-stick coating but all without a label 'PFAS free'; 2= cookware with non-stick coating and a part labeled 'PFAS free; 3= cookware with non-stick coating and everything labeled 'PFAS free'
0=no non-stick cookware or never used; 1=occasionally; 2=weekly; 3=several times a week or daily
0=never; 1=occasionally; 2=weekly to daily
0=no, never had; 1=no, not anymore since the PFAS no regret measures; 2=yes, especially in planters; 3=yes, especially in open ground
0=never had; 1= in the past but not anymore; 2=yes
0=no compost heap or never used in a vegetable garden; 1=sometimes use of compost heap in vegetable garden; 2=often use of compost heap in vegetable garden
0=never had; 1=once had, now no more; 2=yes
0=no well now; 1=less than 10m deep; 2=10-30m deep; 3=31-100m deep; 4=more than 100m deep
0=no well now; 1=less than 10m deep; 2=more than 10m deep
0=no, never had my own chickens; 1=earlier, stopped for no regret measures (before June 2021); 2=earlier, stopped because of no regret measures or communication blood tests (after June 2021); 3=yes still
0=never; 1=not last 3 months; 2=monthly; 3=weekly; 4=daily or more
0=never; 1=not last 3 months; 2=monthly; 3=weekly or more
0=never; 1=not last 3 months; 2=monthly or more
0=never; 1=not last 3 months; 2=monthly; 3=weekly; 4=daily or more (does not appear in the data)
0=never; 1=less than weekly; 2=at least weekly
0=no, never; 1=yes, from neighbours, friends or family in the demarcated zone; 2=yes, from local farmers in the demarcated zone
0=no (never or ever once); 1=yes, less than daily; 2=yes, daily (does not appear in the data)
0=rarely or never; 1=weekly or more often
0=never; 1=less than monthly; 2=monthly or more often
1=end of June/beginning of July; 2=August
1=severely underweight (does not appear in the data); 2=underweight; 3=healthy weight; 4=overweight; 5=Severely overweight
1=(severely) underweight; 2=normal weight; 3=(severe) overweight
1=healthy; 2=increased risk; 3=greatly increased risk
1=before 10 o'clock; 2=after 10 o'clock and before 12 o'clock; 3=12h or later
1=<:2 hours; 2=<=4 hours; 3=<=6 hours; 4=More than 6 hours
0=participants in zone Beveren; 1=participants in zone Zwijndrecht >1.5 km; 2=participants in the Antwerp zone; 3=participants in zone Burcht; 4=participants in zone Kallo; 5=participants in zone Zwijndrecht <1.5km
Beveren = participants in zone Beveren (Melsele); Zwijndrecht=participants in zone Zwijndrecht >1.5 km; Antwerp = participants in the Antwerp zone; Burcht=participants in the Burcht zone; Kallo = participants in the Kallo zone; Zwijndrecht<1.5 km = participants in zone Zwijndrecht <1.5km
1=water from the rain barrel or cistern; 2=water from groundwater well; 3=tap water (city water); 4=Other
0=never/occasionally; 1=regular/often to always (does not appear in the data)
1= chickens for 5 years or less; 2= chickens for more than 5 years
1=chickens are 2 years old or younger; 2=chickens are between 2 and 4 years old; 3=chickens are older than 4 years
1=home-grown; 2=bought at Kwerke store; 3= received from someone else; 4=older battery chickens (does not appear in data)
1=in; 2=outside on a pavement (does not appear in the data); 3=outside on the bottom; 4=outside in a manger
1=water from the rain barrel or cistern; 2=water from the groundwater well; 3=tap water (city water)
1=free-range space 20 m² or less; 2=free-range space more than 20 m²
1=less than a fourth; 2=between a quarter and a half; 3=more than half
0=no (not in living room and not in bedroom); 1=yes (in living room or bedroom)
0=not; 1=manual (and not with grids or mechanical); 2=grids (possibly also manual but not mechanical); 3=mechanical (possibly also manually and with grids)
0=nowhere; 1=in living room or in bedroom; 2=in both rooms
0=nowhere or only in the living room or bedroom; 1=in living room and in bedroom
0=nowhere; 1=in living room or in bedroom, or in both rooms
0=nowhere; 1=in living room or bedroom; 2=in both rooms
1=never or windows are not possible or less than daily; 2=daily short-lived; 3=daily for a long time
1=weekly or less; 2=several times a week ; 3=daily
1=weekly or less; 2=several times a week or daily
1=monthly or less; 2=several times a month or more
1=monthly or less; 2=several times a month or weekly; 3=several times a week or daily
1=never; 2=monthly or less; 3=several times a month or more
1=living room; 2=bedroom of the participant; 3=both (living room and bedroom of the participant); 4=Other
1=untreated wood; 2=wood with wax, varnish or paint; 3=wood with laminate; 4=metal with lacquer/paint; 5=plastic; 6=mixture (marked as multiple answers); 7=Other
1=one year ago or more; 2=more than 3 months ago; 3=less than 3 months ago
1=only on top of the cabinet; 2=only in the closet; 3=only on the windowsill; 4=only on the curtain box; 5=only in another place; 6=in several places
1=No, never had; 2=No, not anymore since this is discouraged by the government in the vicinity of 3M (no regret measures from June 2021); 3=Yes, in planters; 4=Yes, in open ground
1=Water from the rain barrel or cistern; 2=Water from the groundwater well; 3=Tap water (city water); 4=Other
1=garden hose; 2=watering can in plastic; 3=Other
1=No; 2=Yes, only purchased compost; 3=Yes, from our own compost bin; 4=Yes, from our own dung heap
1=Never; 2=Occasionally; 3=Regular; 4=Often to always
1=Homegrown; 2=Purchased from a grower/shop; 3=Received from someone else; 4=Old battery chickens; 5=Other
1=Indoor; 2=Outside on a pavement; 3=Outside on the bottom; 4=Outside in a manger
1=circle; 2=rectangle; 3=square; 4=polygon; 5=Other
1=less than 1/4; 2=between 1/4 and half; 3=between half and 3/4; 4=more than three-quarters
1=less than 5 years; 2=between 5 and 10 years; 3=between 10 and 20 years old; 4=over 20 years old
1=version questionnaire=vegetable garden and chickens; 2=version of the questionnaire vegetable garden and/or chickens
1=no; 2=yes, occasionally (less than weekly); 3=yes, once a week; 4=yes, several times a week; 5=yes, daily
1=never; 2=less than daily; 3= daily short-term ventilation; 4= open daily for a long time (e.g. half or all day windows/doors open or in tilt position); 5= opening windows is not possible
1=never; 2=monthly or less; 3=several times a month or weekly; 4=Several times a week; 5=daily
1=one year ago or more; 2=more than 3 months ago; 3=less than 3 months ago; 4=I don't know