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Table 1 Main characteristics of included studies. RCT, randomized controlled trial; BMI, body mass index; SBP, systolic blood pressure; LDL, low density lipoprotein; NA, not available

From: Whole grain food diet slightly reduces cardiovascular risks in obese/overweight adults: a systematic review and meta-analysis

Author, Year

Study design

Intervention

Duration of trial (week)

Number

Age

Mean Body weight (kg)

Mean Waist circumference (cm)

Mean BMI (kg, m2)

Mean SBP (mmHg)

Mean LDL (mmol, L)

Katcher, 2008 [25]

RCT

Whole grain

12

50

NA

103.1 vs 106.2

82 vs 83.2

NA

123 vs 130

2.83 vs 2.93

K. Rave, 2007 [26]

RCT

Whole grain

4

NA

NA

97.5 vs 98.8

NA

33.2 vs 33.7

131 vs 134

3.8 vs 3.8

HARRIS JACKSON, 2014 [27]

RCT

Whole grain

12

25 VS 25

45.8 vs 46.4

99.5 vs 99.7

NA

33.5 vs 32.9

NA

NA

Maria Lankinen, 2014 [28]

RCT

Whole grain

12

34 Vs 35

NA

NA

106.3 vs 105.8

31.4 vs 31

135 vs 139

3.2 vs 3.4

Roager HM, 2017 [29]

RCT

Whole grain

8

50 Vs 50

NA

85.4 vs 86.1

100.1 vs 100.4

NA

126.2 vs 124.2

3.2 vs 3.2

Kirwan, 2016 [30]

RCT

Whole grain

8

33 Vs 33

NA

93.2 vs 93.7

96.4 vs 95.5

32.9 vs 33.1

NA

2.76 vs 2.76

I.A.Brownlee, 2010 [31]

RCT

Whole grain

16

33 VS 33

45.9 vs 45.6

86.7 vs 86.7

NA

30 vs 30

125.5 vs 127.3

3.2 vs 3.2

Steven K. Malin, 2018 [32]

RCT

Whole grain

8

14 VS 14

37.9 vs 37.9

97.9 vs 97.9

NA

33.8 vs 33.9

NA

NA

SCHUTTE, 2018 [33]

RCT

Whole grain

12

25 vs 25

61 vs 61

84.6 vs 86.2

102.2 vs 103.4

27.6 vs 28

NA

NA

Bernard J. Venn, 2010 [34]

RCT

Whole grain

72

53 vs 55

42 vs 42

99 vs 95

NA

36.1 vs 34.7

NA

NA

P. Hajihashemi, 2014 [35]

RCT

Whole grain

6

44 vs 44

11.2 vs 11.2

51.26 vs 51.26

80.69 vs 80.69

23.57 vs 23.57

NA

NA

K. Nelson, 2016 [36]

RCT

Whole grain

4

10 vs 10

NA

NA

NA

30.77 vs 31

133.3 vs 132.1

3.27 vs 3.12

Paula Tighe, 2013 [37]

RCT

Whole grain

12

73 vs 63

51.6 vs 51.8

NA

85.7 vs 90.9

28 vs 28

125.9 vs 131.2

3.45 vs 3.66

Mette Kristensen, 2017 [38]

RCT

Whole grain

12

30 vs 30

NA

NA

NA

28.5 vs 28.4

130 vs 130

3.7 vs 3.7

S. FATAHI, 2018 [39]

RCT

Whole grain, fruits and vegetables, both

10

25 vs 25 vs 25

36.7 vs 34.6 vs 39.9

NA

NA

32.1 vs 32.3 vs 32.7

NA

NA

Xue Li, 2016 [40]

RCT

Whole grain

4

60 vs 79 vs 80 vs 79

59 vs 59.73 vs 59.72 vs 59.44

NA

NA

NA

143.7 vs 147.2 vs 144.9 vs 147.1

NA

Kevin C. Maki, 2010 [41]

RCT

Whole grain

12

77 vs 67

50.1 vs 47.5

88.7 vs 87.6

104.5 vs 105.2

32 vs 32.2

NA

4 vs 3.99

V. D. F. de Mello, 2011 [42]

RCT

Whole grain, Healthy diet

12

34 vs 36 vs 34

58 vs 59 vs 59

89.2 vs 89.8 vs 89.5

106.3 vs 105.7 vs 105.7

31.4 vs 31.1 vs 30.9

135 vs 138 vs 139

3.2 vs 3.1 vs 3.4

A. Stefoskaneedham, 2017 [43]

RCT

Whole grain

12

30 vs 30

48.1 vs 48.6

87.1 vs 86.1

102.5 vs 105.3

31.2 vs 31.6

122.3 vs 126.2

3.2 vs 3.5

Kristensen, 2012 [44]

RCT

Whole grain

12

38 vs 34

NA

81.3 vs 83.5

97.3 vs 99

30 vs 30.4

133 vs 138

3.75 vs 3.75

J. Tovar, 2014 [45]

RCT

Whole grain

4

26 vs 26

NA

NA

NA

NA

NA

NA

Mette Kristensen, 2017 [38]

RCT

Whole grain

12

81 vs 88

36.2 vs 35.3

80.2 vs 81.5

NA

30.2 vs 30.1

109.8 vs 111.2

2.9 vs 2.72