Anthropometry self-measurements (section: physical state) were performed by participants aged 16 years and older during:

• 4A Visit 1

• Anthropometry self-measurement was the first measurement during visit 1, preceding the blood pressure self-measurement and measurements performed by a research nurse in the examination room.
• When registering at the reception desk, participants completed a digital contraindication questionnaire to exclude participants with a contra-indication.
• If no contraindications were present, the participant received a barcode that could be used to identify themselves at the self-measurement boot.
• Anthropometry self-measurement was performed with a SECA mBCA555. After scanning the barcode, the participant followed written instructions (presented on a poster on the wall) to perform the measurement. Instructions include the request to remove heavy clothing (jackets/pullovers), to empty pockets (i.e. keys, mobile phone and wallet removed), shoes and socks and to step on the SECA device with bare feet and stand upright. A bell was present in the boot to request assistance from an employee.
• First, length and weight were measured. Subsequently, a bio-impedence measurement was performed.

Participants did not perform the anthropometry self-measurement in case of:

• Electronic implant (pacemaker, internal defibrillator, insulin pump, neurostrimulator, cochleair hearing implant)
• Prostheses: foot, leg, arm, hip, knee, and hand prostheses
• Pregnancy
• Cardiac arrhythmias
• Wearing compression stockings that could not be taken off

A validation study was performed to compare the results of the height and weight self-measurements, with the results from the measurements performed by a research nurse. More information will follow.