All Lifelines participants of 8 years and older participating in general assessment 2A visited a location of their choice. A trained physician's assistant performed the described measurements, according to the Standard Operating Procedure below.
2A Visit 1 was accompanied by 2A Questionnaire 1 which was filled in, on average, 34 days (SD: ± 43 days) prior to visit 1.
2A Visit 1 was followed by 2A Visit 2 within, on average, 40 days.
2A Visit 1 is procedurally equivalent to 1A Visit 1 and 3A Visit 1. The average time between 1A Visit 1 and 2A Visit 1 was 3 years and 11 months.