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Table 1 Characteristic of included studies in meta-analysis

From: The effects of conjugated linoleic acid supplementation on glycemic control, adipokines, cytokines, malondialdehyde and liver function enzymes in patients at risk of cardiovascular disease: a GRADE-assessed systematic review and dose–response meta-analysis

studies

Country

Study Design

Participant

Sample size and Sex

Sample size

Trial Duration

(Week)

Means Age

Means BMI

Intervention

IG

CG

IG

CG

IG

CG

CLA (g/d)

Control group

RISerus et al. 2002 (a) [44]

Sweden

paralell, R, PC, DB

Obese Men with the Metabolic Syndrome

M: 38

19

19

12

51 ± 7.1

53 ± 10.1

30.1 ± 1.8

30.2 ± 1.8

3.4

placebo

RISerus et al. 2002 (b)

Sweden

paralell, R, PC, DB

Obese Men with the Metabolic Syndrome

M: 38

19

19

12

55 ± 7.1

53 ± 10.1

31.2 ± 2.5

30.2 ± 1.8

3.4

placebo

Moloney et al. 2004 [35]

United Kingdom

paralell, R, PC, DB

type 2 diabetes mellitus

M/F: 32

16

16

8

63.8 ± 8.8

58.1 ± 10.8

29.1 ± 4

30.7 ± 4.8

3

control diet

Naumann et al. 2006 (a) [45]

Netherlands

paralell, R, PC, DB

overweight subjects with LDL phenotype B

M/F: 68

34

34

13

51 ± 7

51 ± 9

28.6 ± 2.3

28 ± 2.2

3

control diet

Naumann et al. 2006 (b)

Netherlands

paralell, R, PC, DB

overweight subjects with LDL phenotype B

M/F:53

19

34

13

55 ± 7

51 ± 9

29.3 ± 2.4

28 ± 2.2

3

control diet

Schmitt et al. 2006 [46]

France

paralell, R, PC, DB

type 2 diabetes

M/F (F:10, M:16)

13

13

12

54.38 ± 8.96

61.62 ± 9.27

32.07 ± 5.37

31.81 ± 4.16

4.5

control diet

Zhao et al. 2009 [36]

China

paralell, R, PC, DB

Obesity-Related Hypertension

M/F (F:36, M:44)

40

40

8

62.3 ± 3.5

59.4 ± 2.4

32.3 ± 2.3

31.2 ± 1.4

4.5

control diet

Norris et al. 2009 [42]

Germany

paralell, R, PC, DB

postmenopausal women with type 2 diabetes mellitus

F: 55

22

33

16

59.4 ± 7.3

60.1 ± 7.3

37.1 ± 7.2

36.3 ± 6.1

6.4

control diet

Shadman et al. 2010 [37]

Iran

paralell, R, PC, DB

type 2 diabetic patients

M/F (F:20, M:19)

19

20

8

45.14 ± 5.77

46.53 ± 4.38

27.48 ± 3.59

27.13 ± 1.87

3

placebo

Joseph et al. 2011 (a) [34]

Canada

crossover, R, PC, DB

Overweight, Hyperlipidemic

M: 27

27

27

8

18–60

18–60

31.5 ± 4

31.3 ± 4

3.5

placebo

Joseph et al. 2011 (b)

Canada

crossover, R, PC, DB

Overweight, Hyperlipidemic

M: 27

27

27

8

18–60

18–60

31.4 ± 4

31.3 ± 4

3.5

placebo

Shadman et al. 2013 [38]

Iran

paralell, R, PC, DB

overweight type2 diabetics

M/F (F:21, M:18)

19

20

8

45.1 ± 5.7

45.5 ± 4.3

27.4 ± 0.5

27.1 ± 1.8

3

placebo

Carvalho et al. 2013

Brazil

paralell, R, PC, DB

metabolic syndrome

F: 14

7

7

12

40 ± 14.12

42 ± 5.16

32.53 ± 2.1

32.3 ± 2.16

3

placebo

Eftekhari et al. 2013 [41]

Iran

paralell, R, PC

atherosclerotic patients

M/F: 57

29

28

8

52.79 ± 14.11

55.85 ± 14.13

24.02 ± 2.76

24.66 ± 2.34

3

control diet

Ebrahimi-Mameghani et al. 2016 [40]

Iran

paralell, R, PC, B

Non-Alcoholic Fatty Liver Disease

M/F (F:33, M:5)

19

19

8

36.74 ± 6.87

38.58 ± 8.24

32.72 ± 4.63

35.27 ± 3.46

3

placebo

Abedi et al. 2018 [39]

Iran

paralell, R, PC, SB

Non-Alcoholic Fatty Liver Disease

M/F (F:32, M: 6)

19

19

8

36.74 ± 6.87

38.58 ± 8.24

32.72 ± 4.63

35.27 ± 3.46

3

control diet

  1. Abbreviations: IG Intervention group, CG Control group, DB Double-blinded, SB Single-blinded, PC Placebo-controlled, CO Controlled, RA Randomized, NR Not reported, F Female, M Male, NR Not reported