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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'.