Cohorts of The Rotterdam Study
The Rotterdam Study comprises three cohorts.
The initial cohort (RS-I) started out in 1990 with 7,983 men and women aged 55 years and over. Follow-up visits were held in 1994-1995, in 1997-1999, 2002–2004, and 2009-2011.
In 2000-2001 a second cohort was established (RS-II). Another 3,011 inhabitants of Ommoord aged 55 years and over agreed to participate. The participants of this second cohort visited the research center for a follow-up examinations in 2004-2005 and 2011-2012.
The third cohort of the Rotterdam Study (RS-III) started in 2006, this time with inhabitants aged 45 years and over. Inclusion ended in December 2008 and 3,932 participants have been included in this third cohort. The first follow-up examinations have started in 2012.
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