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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.