1. Selection of the fieldwork site and staff Johanna Mäki-Opas

2. Possible examination sites Home Temporal examination site Examination site within existing health care premises Mobile examination site

3. Selecting the examination site Cultural factors and health care system Distance Public transportation Special requirements for the measurements Temperature Quietness Sample storage Privacy Enough room for special measurements

4. Advantages and disadvantages of the examination sites HomeTemporal examination site Examination site with in health care premises Mobile examination site Access by participants EasyRequires effort May be quite easy Costs for participant NoneTravel costs Some travel costs Environment Atmosphere Privacy Temperature Quietness Relaxed May be limited No control Some tension Good Can be controlled Some tension Good Can be controlled Some tension Good Can be controlled Safety of the fieldwork staff Cannot be controlled Can be controlled

5. HomeTemporal examination site Examination site within health care premises Mobile examination site Restrictions to measurements YesNoneUsually noneSome Standardization of the measurements DifficultCan be done Acceptability by participants Some people are not willing to let staff enter their home Generally accepted May not be highly valued among some people Generally accepted

6. Selection of fieldwork staff General principles for selecting the staff: Legislation Professional competence Cultural norms Motivation to follow the survey protocol Willingness to travel Fluency of the languages General appearance

7. Professions recommended to carry out the core EHES clinical measurements Registered nurse Certified phlebotomist Physician available for consultation

8. Setting up the fieldwork team Number of the personnel Rotation of the duties Leadership in the field Consultation and supervision

9. Example of fieldwork team Nurse 1 Reception of the participants, obtaining consent, health interview and/or checking the self administered questionnaire Nurse 2 Blood pressure measurement, height, weight and waist circumference measurement Phlebotomist Drawing and processing blood samples