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=monthly or less; 3=several times a month or weekly; 4=several times a week; 5=daily
1=Daily; 2=4-6 times a week ; 3=2-3 times a week ; 4=1 time a week ; 5=Rarely ; 6=Never
1=3 or more times a week; 2=1 or 2 times a 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=more than 1x/day; 2=1x/day; 3=more day 1x/week; 4=1x/week; 5=less than 1x/week
1=false; 2= little bit true; 3=definitely true
1=Always; 2=Usually; 3=Sometimes; 4=Rare; 5=Never
1=Are very happy; 2=Are rather happy; 3=Are not very happy; 4=Are not happy at all
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 no longer menstruate because of e.g. pregnancy, medication, illness, ...
1=little knowledge; 2-9=(in between); 10= a lot of knowledge
1=little talked about; 2-9=(in between); 10= much talked about
1=not worried; 2=reasonably reassured; 3=neutral; 4= fairly worried; 5= completely worried
1=very little trust; 2=low trust; 3=neutral; 4=a lot of trust; 5=a lot of trust
1=very satisfied; 2=rather satisfied; 3=neither satisfied nor dissatisfied; 4=rather dissatisfied; 5=very dissatisfied
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
0=no; 1=yes; 2=we don't have a compost heap
1=never; 2=occasionally; 3=regular; 4=often to always
1=in; 2=outside on a pavement (e.g. concrete); 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); 4=Other
1=less than a fourth; 2=between a quarter and a half; 3=between half and three quarters; 4=more than three-quarters
1=yes, once; 2=yes, several times; 3=no, never; 4=I don't know/I don't know this research
1=biological mother; 2=biological father; 3=other person
1=biological mother; 2=biological father; 3=other person; 4=none, this is a single-parent family
1=No diploma; 2=Primary education; 3=Lower secondary education (1st or 2nd grade); 4=Upper secondary education (3rd grade or 7th year); 5=Higher non-university education (professional bachelor); 6=University education (master, PhD); 7=Other
1=Very difficult; 2=Difficult; 3=Rather difficult; 4=Rather easy; 5=Easy; 6=Very easy
1=Always or most of the time; 2=Half the time or less ; 3=Only on weekends and holidays ; 4=Almost never
1=house; 2=apartment/studio on the ground floor; 3=apartment/studio floor
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=not applicable; 2=never; 3=less than 1 time per week; 4=1-3 times a week; 5=4 to 7 times a week
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
1=As main heating; 2=Often, as additional heating in winter, autumn or spring; 3=Sometimes, as additional heating on very cold days; 4=Little, just for fun; 5=Rarely or never
0=No, I never or rarely heat; 1=Yes, I heat outside several times a year
1=No; 2=Yes, in the garage ; 3=Yes, in the entrance hall ; 4=Yes, in another room
1=No, never; 2= In the past yes but not anymore; 3=Yes, occasionally (less than weekly); 4=Yes, once a week; 5=Yes, several times a week; 6=Yes, daily
1=plastic; 2=copper; 3=lead; 4=other; 5=I don't know
1=yes; 2=once had but not anymore; 3=never had
1=Less than 10 meters deep; 2=10-30 meters deep; 3=31-100 meters deep; 4=More than 100 meters deep; 5=I don't know
1=Footwear on the outside; 2=Slippers; 3=None (bare feet or socks
1=Yes, everyone; 2=Yes, some ; 3=No, no one
1=Occasionally; 2=Every week; 3=Every day; 4=I don't know (anymore)
1=1st child; 2=2nd child; 3=3rd child; 4=...-the child; 5=I don't know
1=ever once; 2=less than 1x/month; 3=at least 1x/month but not every week; 4=at least 1x/week but not every day; 5=every day
1=no never; 2=yes once in a while; 3=yes several ekeren
1=very good; 2=good; 3=goes well/reasonably; 4=bad; 5=very bad
0=no; 1=complete (at least AB1, AB2, AB3, AS1); 2=incomplete
0=no; 1=complete (AU1, AU2, AU3 and AU4); 2=incomplete
1=Never; 2=1- 3 times a month; 3=1- 3 times a week; 4=4- 6 times a week ; 5=1 times a day ; 6=2 or more times a day
1=no, never had; 2=no, but it used to be; 3=yes
1=Yes, fruit and/or vegetables from neighbours, friends or family in the demarcated zone; 2=Yes, fruit and/or vegetables from local farmers in the demarcated zone; 3=no; 4=I don't know
1=yes; 2=no, not now but in the past; 3=no, never done
1=never; 2=occasionally; 3=regular; 4=daily or more
1=zone1; 2=zone2; 3=zone3; 4=zone4east; 5=zone4west