Table 2 The association between alleles of Taq1A and the weight of adults with a BMI in the healthy range and who are overweight

From: A meta-analysis of the relationship between brain dopamine receptors and obesity: a matter of changes in behavior rather than food addiction?

 

Sample

Age

N

BMI

A1/A1

BMI

A1/A2

BMI

A2/A2

%

A1/A1

%

A1/A2

%

A2/A2

Spitz et al.28

Control

Obese BMI >30

Matched to cancer patients in another study

62 Years

64 Years

139

37

27.5

NS

26.1

31.2%

58.3%

P<0.002

68.8%

41.7%

Thomas et al.37

Male BMI <27

Female BMI <25

Not obese Obese (BMI higher than 27 or 25)

42 Years

383

 

NA

 

20.7%

20.6%

50.0%

52.7%

NS

29.3%

26.7%

Thomas et al.29

(BMI males <27, females BMI <25)

Not obese

Obese (BMI higher than 27 or 25)

44.1 Years

50.0 Years

506

484

25.0

24.8

NS

24.6

19.3%

21.6%

48.8%

54.9%

p<0.03

31.9%

23.4%

Southon et al.38

Women

Leaner BMI 22.5

Heavier BMI 36.1

54.3 Years

55.6 Years

  

NA

 

0%

0%

65%

40%

NS

35%

60%

Epstein et al.30

Smokers

43.5 Years

88

26.7

NS

27.5

3.4%

43.2%

53.4%

Fang et al.31

Normotensive

Hypertensive

38.1 Years

41.7 Years

141

133

25.6

25.1

NS

25.5

17.9%

49.6%

32.4%

Morton et al.35

Nonsmokers

Former smokers

Current smokers

If BMI >30

55–74 Years

442

Odds ratio

1.28

BMI >30

1.40 P<0.02

1.00

4.4%

29.6%

65.9%

Nisoli et al.32

Control BMI 23.7

Obese BMI 42.7

31.2 Years

46.9 Years

54

71

23.6

42.1

NS

23.8

43.1

1.9%

8.4%

24.4%

26.8%

NS

73.7%

64.8%

Epstein et al.33

Smokers

Nonobese BMI <30

Obese BMI >30

23.4 Years

29.3 Years

45

29

26.3

NS

29.0

   

Davis et al.39

Control BMI 22.4

Obese BMI 39.1

33.5 Years

36.3 Years

59

51

 

NA

 

1.7%

5.9%

32.2%

43.1%

NS

66.1%

51.0%

Stice et al.19 a

Females BMI 28.6

20.4 Years

43

28.5

NS

27.9

25.6%

74.4%

Epstein et al.69

BMI >30

42 Years

26

 

NA

 

42.3%

57.7%

Chen et al.36

Controls BMI 21.9

Obese/overweight

BMI 29.3

36.5 Years

42.3 Years

105

122

 

NA

 

33.4%

67.0%

P<0.001

66.6%

33.0%

Roth et al.22

Lean adults

25 Years

583

18.2

19.1

NS

19.2

2.6%

27.6%

69.8%

Athanasoulia et al.34

Patients with prolactinomas

53.1 Years

44

26.6

NS

25.9

6.8%

40.9%

52.3%

Hardman et al.23

Representative sample of mothers

Age

NA

2513

24.7

25.0

NS

24.8

3.7%

30.4%

65.8%

Yokum et al.24

Females

20.9 Years

34

Average BMI 28.2

No details but BMI did not differ with allele

   
  1. Abbreviations: BMI, body mass index (in kg m−2); NA, not available; NS, non-significant.
  2. aThese BMI values are not presented in the paper but have been calculated from data points included in figures.