Measuring weight using electronic scale

Based on EHES Manual, Part B. Fieldwork Procedures, 2nd edition (2016) Available at: http://urn.fi/URN:ISBN:978-952-302-701-5 These slides can be used freely, translated and adapted to national use (e.g. concerning the equipment). However, it is important to keep in mind that no changes should be made to the measurement techniques, which need to be standardized.

Equipment Electronic scale Calibration weights Carpenter’s level (if the scale has not a built in level)

Checking and calibration Daily or when a new examination site is set up: Place the scale on hard floor Check that the scale is horizontal (by carpenter's level or level in the device) If the scale is operated on batteries, check that there is voltage on the batteries and that spare ones are on hand If the scale is operated on power cord, check that the power cord is properly attached to the device and whether an adapter is needed Check the zero level of the scale Record the results of calibration and checking in the survey log book

Calibration Use standard (calibration) weights to check the scale at regular intervals Place 10 kg or 20 kg weights one by one on the scale up to 100 kg and check that the scale works properly If the error is greater than 0.2 kg the scale should be corrected or changed Kuvan reunat pitäisi pyöristää

Motivate participant Explain why weight is measured Previous measurements may be inaccurate and not comparable to the results from other participants Your weight is likely to vary even daily Accurate weight is needed e.g. to calculate body mass index, which is an indicator of obesity

Exclusion criteria Weight is not measured if participant is immobile or in a wheelchair and has severe difficulties standing steady is heavier than the upper limit of the scale refuses

Clothing Ask the participant to undress to his/her underwear or as light clothing as feasible If the participant refuses or feels uncomfortable to undress, ask him/her at least to take off shoes, heavy garments such as jacket, pullover, belts, heavy jewellery, and empty pockets

Posture Ask the participant to stand still In the centre of the platform Arms hanging loosely at his/her sides Weight distributed evenly on both feet

Recording Record weight to the resolution of the scale Record extra clothing, if more than underwear If the participant is pregnant, ask and record pregnancy weeks and the weight before pregnancy separately from the measured weight If weight is not measured, record the reason Record the number of the measurement device used

Acknowledgements Slides prepared by: Johanna Mäki-Opas, Annamari Lundqvist, Hanna Tolonen, Päivikki Koponen Photographs: Hanna Tolonen Measurement demonstrations by Ulla Leskinen and voluntary participants Experiences and feedback from the EHES network have been utilized in the preparation of these slides Funding: Preparation of the slides is part of the activities of the EHES Coordinating Centre which has received funding from the EC/DG SANTÉ in 2009-2012 through SANCO/2008/C2/02-SI2.538318 EHES and Grand Agreement number 2009-23-01, and in 2015-2017 through Grand Agreement number 664691/BRIDGE Health

Disclaimer The views expressed here are those of the authors and they do not represent the Commission’s official position.