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Table 3 Characteristics at baseline and ten years for age-standardised group, adjusted odds ratios (and 95% confidence intervals) for age standardised and age matched analysis

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)

Group:   Baseline (n = 7013) Year 10 (n = 3145) Age standardised Age matched
   No (%) No (%) OR 95% C.I. OR 95% C.I.
Age (years) 70–74 366 (7) 32 (1) 7.2 (4.9–10.6) Matched
  75–79 2883 (40) 1238 (43) 1.0    
  80–84 2256 (31) 1016 (35) 0.8 (0.7–0.9)   
  85+ 1508 (21) 859 (21) 0.7 (0.6–0.8)   
Centre Cambridgeshire 1,385 (19) 645 (21) 0.8 (0.6–0.9) Matched
  Gwynedd 1,541 (21) 721 (23) 0.8 (0.7–0.9)   
  Newcastle 1,299 (19) 575 (18) 1.0 (0.8–1.1)   
  Nottingham 1,318 (18) 511 (16) 1.0 (0.9–1.2)   
  Oxford 1,470 (23) 693 (21) 1.0    
Women Women 4,540 (65) 1,907 (60) Not included Not included
Accomodation: Own Home 5,737 (82) 2,693 (87) 1.0   Not included
  Warden controlled 708 (10) 261 (8) 1.3 (1.1–1.6)   
  Residential home 537 (8) 184 (5) 1.0 (0.7–1.3)   
Marital status Married/cohabiting 2,614 (39) 1,237 (41) 1.0   1.0  
  Single 622 (9) 227 (7) 1.3 (1.0–1.6) 1.4 (1.1–1.8)
  Widowed 3,458 (50) 1,547 (48) 1.2 (1.0–1.3) 1.2 (1.1–1.4)
  Divorced/Separated 154 (2) 109 (4) 0.6 (0.5–0.9) 0.6 (0.4–0.9)
Manual social class 3,758 (57) 1,543 (50) Not included Not included
Years of education <=9 4,306 (64) 1,723 (55) 1.3 (1.2–1.5) 1.4 (1.2–1.6)
MMSE Incomplete 218 (3) 41 (1) 5.6 (2.6–11.7) 6.8 (2.9–15.7)
  <= 21 630 (9) 189 (5) 2.9 (2.0–4.1) 2.9 (2.1–4.0)
  22–25 745 (10) 222 (7) 2.1 (1.7–2.6) 2.3 (1.8–2.8)
  26–28 2004 (29) 682 (21) 1.8 (1.6–2.0) 1.9 (1.7–2.2)
  29–30 3416 (49) 2011 (66) 1.0   1.0  
Screening AGECAT O3+ 699 (10) 242 (7) 0.8 (0.6–1.0) Not included
Family history of dementia 687 (10) 505 (16) 0.6 (0.5–0.7) 0.6 (0.5–0.7)
Depression ever 443 (7) 447 (15) 0.4 (0.3–0.5) 0.4 (0.3–0.5)
Disability No ADL-IADL disability 3,832 (56) 1,575 (54) 1.0   1.0  
  IADL disability only 1,192 (17) 762 (25) 0.6 (0.6–0.7) 0.6 (0.5–0.7)
  ADL disability 1,843 (26) 700 (21) 0.8 (0.7–0.9) 0.8 (0.7–1.0)
Townsend ADL 11+ 1,269 (19) 608 (19) Not included Not included
Stroke   595 (9) 309 (10) Not included Not included
More than one cardiovascular disease 2,836 (42) 2,000 (66) 0.5 (0.5–0.6) 0.5 (0.5–0.5)
Self perceived health Poor 1,216 (18) 551 (18) 0.9 (0.8–1.1) 1.0 (0.9–1.2)
  Fair 3,115 (47) 1557 (53) 1.0    1.0
  Good 1,954 (29) 747 (25) 1.5 (1.3–1.7) 1.3 (1.1–1.5)
  Excellent 382 (6) 117 (4) 1.9 (1.4–2.4) 1.7 (1.3–2.3)
Sight or hearing problem 2,773 (40) 1,020 (31) 1.6 (1.5–1.8) 1.6 (1.4–1.8)
Ever smoked   2,697 (60) 2,044 (66) 0.8 (0.7–0.9) 0.8 (0.7–0.9)
Alcohol Don't drink 1,012 (17) 289 (10) 1.6 (1.3–1.8) 1.7 (1.4–2.1)
  Drink not to excess 4,016 (67) 2028 (71) 1.0   1.0  
  Drink evidence of excess 968 (16) 532 (19) 0.9 (0.8–1.1) 0.9 (0.8–1.1)
  1. No: Number, % Percentages back-weighted for over sampling at baseline, Odds ratio (OR) and 95% confidence interval (C.I.)