Whitehall II data collection
Phases of data collection
| Phase | Dates | Type | Number of participants |
Response Rate |
| 1 | 1985-1988 | Screening / questionnaire | 10,308 |
73% of those invited |
| 2 | 1989-1990 | Questionnaire | 8,132 | 79% of Phase 1 responders |
| 3 | 1991-1994 | Screening / questionnaire | 8,815 | 86% of Phase 1 responders |
| 4 | 1995-1996 | Questionnaire | 8,628 | 84% of Phase 1 responders |
| 5 | 1997-1999 | Screening / questionnaire | 7,870 | 76% of Phase 1 responders |
| 6 | 2001 | Questionnaire | 7,355 | 71% of Phase 1 responders |
| 7 | 2002-2004 | Screening / questionnaire | 6,967 | 68% of Phase 1 responders |
| 8 | 2006 | Questionnaire | 7,173 | 70% of Phase 1 responders |
| 9 | 2007-2009 | Screening / questionnaire | 6,761 | 66% of Phase 1 responders |
|
10 (Pilot*) |
Feb-Mar 2011 | Screening / questionnaire | 277 |
84% of those invited |
|
11 |
2012-2013 |
Screening / questionnaire |
In progress |
Started in Feb 2012 |
*A small group of
Stress and Health participants were selected randomly and invited to attend our
Phase 10 clinic. This enabled us to successfully pilot new measures for mental well-being introduced at Phase 11.
Page last modified on 16 mar 12 11:09
