1. Study population Women 48-62 years old in 2005
20 391 of answered an 8-page questionnaire autumn 2004 (81 %)
of agreed to donate a blood sample (88 %)
Blood collection kit distributed to the participants, randomly drawn in groups of 500
425 blood samples included in analyses
20 samples excluded (Incompletely filled sample tube, lack of information etc.)
One randomly chosen group: 445 women (89%) contributed a blood sample, April 2005
Total study population by June 2007
Study population Women years old in 2005