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Table 2 Baseline characteristics of entire study and multivariable models for refusal and moving at year 2 and year 10

From: An investigation of whether factors associated with short-term attrition change or persist over ten years: data from the Medical Research Council Cognitive Function and Ageing Study (MRC CFAS)

  

Baseline

Year 2

Year 10

Year 2

Year 10

Group:

   

Refusers

Refusers

Moved

Moved

Total

 

13004

 

2520

 

1373

 

183

 

342

 
    

OR†

95% C.I.

OR†

95% C.I.

OR†

95% C.I.

OR†

95% C.I.

Age

65–69

3,184

(24)

1.0

 

1.0

 

1.0

 

1.0

 
 

70–74

3,150

(24)

1.0

(0.9–1.2)

1.1

(0.9–1.3)

0.9

(0.6–1.4)

0.9

(0.7–1.2)

 

75–79

2,906

(22)

0.7

(0.6–0.8)

1.3

(1.1–1.6)

0.9

(0.6–1.4)

1.3

(1.0–1.8)

 

80+

3,764

(29)

0.7

(0.6–0.8)

1.7

(1.3–2.1)

1.0

(0.6–1.5)

1.9

(1.4–2.7)

MMSE

Incomplete

428

(3)

8.2

(5.7–12.0)

4.0

(2.0–7.9)

2.4

(1.0–5.9)

1.2

(0.4–4.3)

 

<21

1,546

(12)

7.6

(6.2–9.2)

1.7

(1.2–2.5)

1.5

(0.8–2.6)

1.4

(0.8–2.7)

 

22–25

3,072

(24)

3.8

(3.2–4.4)

1.5

(1.2–1.8)

1.2

(0.8–1.8)

1.4

(1.0–2.1)

 

26–28

4,955

(38)

1.5

(1.3–1.7)

1.2

(1.0–1.4)

0.8

(0.6–1.2)

1.5

(1.1–2.0)

 

29–30

3,003

(23)

1.0

 

1.0

 

1.0

 

1.0

 

Centre

Cambridgeshire

2,601

(20)

1.4

(1.2–1.6)

0.6

(0.5–0.8)

0.8

(0.5–1.4)

0.6

(0.4–0.8)

 

Gwynedd

2,625

(20)

1.7

(1.4–1.9)

1.0

(0.8–1.3)

1.2

(0.7–1.9)

0.4

(0.3–0.6)

 

Newcastle

2,524

(19)

1.3

(1.1–1.5)

1.0

(0.8–1.2)

1.5

(1.0–2.3)

0.7

(0.5–1.0)

 

Nottingham

2,514

(19)

1.1

(0.9–1.3)

1.2

(1.0–1.5)

1.2

(0.8–1.9)

0.7

(0.5–0.9)

 

Oxford

2,740

(21)

1.0

 

1.0

 

1.0

 

1.0

 

Women

 

7,847

(60)

1.3

(1.2–1.5)

1.1

(1.0–1.3)

0.8

(0.6–1.1)

1.3

(1.0–1.7)

Years of education >9

4,657

(37)

0.8

(0.7–0.9)

0.8

(0.7–1.0)

    

Type of home

Own home

11,424

(88)

1.0

 

1.0

 

1.0

 

1.0

 
 

Warden controlled

953

(7)

0.8

(0.7–1.0)

0.7

(0.5–1.0)

0.3

(0.1–0.8)

0.9

(0.6–1.5)

 

Residential Home

593

(5)

0.5

(0.3–0.7)

3.0

(0.9–10.1)

0.9

(0.4–2.5)

2.2

(0.6–7.3)

Self perceived health

Poor

2,488

(20)

1.1

(1.0–1.3)

0.7

(0.6–0.9)

    
 

Fair

6,077

(48)

1.0

 

1.0

     
 

Good

3,335

(26)

1.1

(0.9–1.2)

1.1

(1.0–1.3)

    
 

Excellent

723

(6)

1.2

(1.0–1.5)

1.4

(0.9–2.1)

    

Family history of dementia

1,512

(12)

0.7

(0.6–0.8)

0.8

(0.6–0.9)

    

Never married/cohabiting

6,412

(50)

    

0.6

(0.5–0.9)

1.1

(0.9–1.4)

Screening AGECAT O3+

805

(6)

    

1.4

(0.6–3.3)

0.9

(0.2–3.7)

Self reported depression

1,122

(9)

    

1.7

(1.1–2.6)

1.1

(0.7–1.5)

Smoker

8,260

(65)

    

1.5

(1.1–2.2)

0.9

(0.7–1.2)

  1. †Odds ratio (OR) and 95% confidence interval (C.I.) Factors from the previous or later waves models that were not in the best model are shown in italics.
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