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Table 3 Characteristics of participants in current study and wave 5 of Twenty-07 Study

From: Response to written feedback of clinical data within a longitudinal study: a qualitative study exploring the ethical implications

  Male Female All sub-study participants n = 50 (%) All other wave 5 Twenty-07 participants (1970s and 1950s cohorts) n = 1864 (%) P value for chi-square
BMI category    (% ) Range* (% ) Range* N 0.002
   Normal (19.0 to 24.9) 8 8 (32.0) 19.9 - 24.0 (26.6) 19.1 -25.0 492  
   Overweight (27.0 to 29.9) 10 8 (36. 0) 27.1 - 29.8 (22.2) 27.0-30.0 413  
   Obese (30.0 +) 8 8 (32.0) 30.1 - 44.6 (29.6) 30.0-63.4 558  
   Not eligible † - - - (21.5) 401  
% Body Fat       0.315
   Within quoted ranges (see Table 1) 9 5 (28.6)
Men 16.0-20.4
Women 27.2-30.9
(24.1)
Men 13.0-21.0
Women20.2-30.9
449  
   Above quoted ranges 16 19 (71.4)
Men21.6-33.0
Women 31.1-53.1
(68.5)
Men 21.1 -50.9
Women 31.1-61.7
1276  
   Not eligible ¥ 1 - - (7.4) 139  
Cholesterol       0.061
   Normal (≤4 mmol/L) 11 17 (57.1) 2.3 - 3.9 (47.5) 1.80-4.0 886  
   High (>4 mmol/L) 14 7 (42.9) 4.1 - 7.9 (39.2) 4.1-12.3 731  
   Missing 1    (13.3) 247  
HbA1c       0.060
   Normal (<6%) 24 22 (93.9) 4.3 - 6.0 (81.3) 3.4-6.0 1516  
   High (≥ 6%) 1 2 (6.1) 6.1 - 9.5 (5.2) 6.1-13.6 96  
   Missing 1    (13.5) 252  
Registrar General's Social Class for head of household    Percentage Percentage   0.585
   Professional/managerial household (I&II) 16 13 58.0 49.0 913  
   Skilled workers (IIIn-m and man) 9 7 32.0 36.5 681  
   Semi or unskilled household (IV&V) 1 4 10.0 13.8 257  
   Missing - - - 0.7 13  
Wave participation    Percentage Percentage   0.125
   Taken part in all 5 waves 21 18 78.0 69.8 1314  
   Missed 1 wave 1 2 6.0 17.0 311  
   Missed more than 1 wave 4 4 16.0 13.1 239  
  1. * Numbers rounded to 1d.p.
  2. † Those with missing data, underweight or overweight with BMI between 25 and 27.
  3. ¥ Those with missing data or body fat less than 'normal range'.