In April 2007 data collection of the first Donor InSight (DIS-I) started. Between April 2007 and April 2009, each month 2,000 active whole blood and plasma donors were randomly selected and invited to participate.
A total of 50,000 donors (~13% of total donor population) were invited to take part in DIS-I, of whom 31,338 (63%) participated.
The participants received a written questionnaire (pdf). This questionnaires consisted of questions regarding demographic characteristics, donation, lifestyle, health, disease, family composition and medical history as well as menstruation, menopause and pregnancy.
For more information check the flowchart of the Donor InSight population.