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Table 2 Baseline characteristics of the linked sample of CHHiP participants based on additional information extracted from primary care data

From: Linkage of the CHHiP randomised controlled trial with primary care data: a study investigating ways of supplementing cancer trials and improving evidence-based practice

Baseline characteristic

n (% of recorded)

Mean (SD) of recorded

Missing

n (% of 106 linked sample)

Ethnicity

  

37 (35)

 White

64 (93)

  

 Black

4 (6)

  

 Asian

1 (1)

  

Index of multiple deprivation, quintile

  

13 (12)

 1 (≥ 33.881, most deprived)

7 (8)

  

 2

14 (15)

  

 3

15 (16)

  

 4

20 (22)

  

 5 (≤ 8.372, least deprived)

37 (40)

  

Body mass index (kg/m2)

 

28 (5)

61 (57)

Obesity (body mass index ≥30)

12 (27)

  

Systolic blood pressure (mmHg)

 

141 (20)

48 (45)

Diastolic blood pressure (mmHg)

 

78 (11)

48 (45)

Total cholesterol (mmol/l)

 

4.7 (1.0)

68 (64)

High-density lipoprotein (mmol/l)

 

1.3 (0.3)

73 (69)

Smoking status

  

27 (25)

 Active smoker

5 (6)

  

 Ex-smoker

43 (54)

  

 Non-smoker

31 (39)

  

Alcohol consumption

  

20 (19)

 Non-drinker

10 (12)

  

 Safe

51 (59)

  

 Hazardous

21 (24)

  

 Alcoholism

4 (5)

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