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Table 2 Potential predictors of attrition variables

From: Predictors of two forms of attrition in a longitudinal health study involving ageing participants: An analysis based on the Whitehall II study

Potential predictors of attrition variables

When obtained from self-completed questionnaires

Response rate

Age (years)

Phase 1 (1985–1988)

10,308

Gender

Phase 1 ( 1985-1988

10,308

Marital status (Married/not married)

Phase 1 ( 1985-1988

10,308

Occupational grade (3 levels)

Phase 1 ( 1985-1988

10,308

Educational achievement (5 levels)

Phase 5 (1997–1999)

7,870

Retirement

At various phases

 

Housing (owned/rented)

Phase 1 ( 1985-1988

10,308

Number of social activities

Phase 5 (1997–1999)

7,870

SF 36 (mental health & physical function)

Phase 5 (1997–1999)

7,870

Longstanding illness (self-reported yes/no)

Phase 1 ( 1985–1988) only asked of 6339 participants

10,308