Whitehall II data collected

Phases of data collection

Phase	Dates	Type	Number of participants
1	1985-1988	Screening / questionnaire	10,308
2	1989-1990	Questionnaire	8,133
3	1991-1994	Screening / questionnaire	8,637
4	1995-1996	Questionnaire	8,629
5	1997-1999	Screening / questionnaire	7,830
6	2001	Questionnaire	7,344
7	2002-2004	Screening / questionnaire	6,967
8	2006	Questionnaire	7,173
9	2007-2009	Screening / questionnaire	6,762
10	2011	Questionnaire	planned

This page last modified 10 February, 2010 by [Web Administrator]