Skip to main content

Table 1 Baseline characteristics of the studies included in the systemic review

From: What zinc supplementation does and does not achieve in diarrhea prevention: a systematic review and meta-analysis

#

Study

Country

Age (m)

Sample Size†

Zinc Supplementation

Plasma Zinc (μg/dl)

    

Zn

No Zn

Dose (mg)

Frequency/wk

Duration (wk)

Salt

Zn

No Zn

1

Bates et al 1993

The Gambia

7-28

55

54

70

2

60

*

-

-

2

Ninh et al 1996

Vietnam

4-36

73

73

10

1

22

Sulphate

-

-

3

Sazawal et al 1996

India

6-35

286

293

10

7

26

Gluconate

64.7

65.0

4

Rosado et al 1997

Mexico

18-36

54

55

20

7

54

Methionate

-

-

5

Ruel et al 1997

Guatemala

6-9

45

44

10

7

28

Sulphate

97.4

95.8

6

Sazawal et al 1997

India

6-35

298

311

10

7

26

Gluconate

-

-

7

Gardner et al 1998

Jamaica

6-24

31

30

5

7

12

Sulphate

64.6

65.0

8

Lira et al 1998

Brazil

0-6

139

66

5

7

8

Sulphate

-

-

9

Umeta et al 2000

Ethiopia

6-12

100

100

10

7

26

Sulphate

78.0

70.3

10

Shankar et al 2000

Papua New Guinea

6-60

136

138

10

7

46

Gluconate

70.4

70.2

11

Muller et al 2001

Burkina Faso

6-31

356

353

12.5

7

26

Sulphate

-

-

12

Sazawal et al 2001

India

0

581

573

5

7

35

Sulphate

-

-

13

Rahman et al 2001

Bangladesh

12-35

325

161

20

7

2

-

-

-

14

Osendarp et al 2002

Bangladesh

1

152

149

5

7

24

Acetate

66.9

75.9

15

Bhandari et al 2002

India

6-30

1241

1241

10

7

16

Gluconate

-

-

16

Baqui et al 2002

Bangladesh

3-59

3974

4096

20

7

2

Acetate

-

-

17

Baqui et al 2003

Bangladesh

6

323

157

20

1

26

Acetate

-

-

18

Gupta et al 2003

India

6-41

186

94

10

7

16

Sulphate

-

-

19

Sur et al 2003

India

0-12

50

50

5

7

52

Sulphate

-

-

20

Lind et al 2004

Indonesia

6-12

340

170

10

7

26

Sulphate

-

-

21

Penny et al 2004

Peru

6-36

276

136

20

7

26

Gluconate

-

-

22

Alarcon et al 2004

Peru

6-35

111

224

0.7

6

18

Sulphate

-

-

23

Brooks et al 2005

Bangladesh

2-12

809

812

35

7

52

Acetate

-

-

24

Heinig et al 2006

USA

4-10

41

44

5

7

28

Sulphate

-

-

25

Sazawal et al 2006

Tanzania

1-35

8120

8006

10

7

56

-

-

-

26

Long et al 2006

Mexico

6-15

389

198

20

7

 

Methionate

71.0

76.0

27

Richard et al 2006

Peru

0.5-15

428

215

20

7

28

Sulphate

-

-

28

Tielsch et al 2006

Nepal

1-36

7297

14241

10

7

68

Sulphate

-

-

29

Tielsch et al 2007

Nepal

1-35

20968

20308

10

7

 

Sulphate

-

-

30

Gupta et al 2007

India

6-48

854

858

25

2

26

-

-

-

31

Sazawal et al 2007

Tanzania

1-36

21274

21272

10

7

68

-

78.0

79.0

32

Bhandari et al 2007

India

1-23

47110

47249

10

7

52

Sulphate

64.0

64.2

33

Luabeya et al 2007

South Africa

4-6

202

105

10

7

72

Gluconate

77.2

78.6

34

Brown et al 2007

Peru

6-8

203

99

3

7

26

Sulphate

77.1

78.6

35

Fischer Walker et al 2007

India, Pakistan, Ethiopia

1-5

554

556

10

7

2

Sulphate

-

-

36

Chhagan et al 2009

South Africa

6-24

202

104

10

7

72

Sulphate

-

-

37

Taneja et al 2009

India

0

1026

1026

5

7

52

Sulphate

63.4

64.7

  1. †Zn, zinc supplemented group; No Zn, zinc withheld group, details of the actual comparisons are provided in Supplementary Table (see Additional File 4)
  2. * Mentioned as acetate/gluconate; -, not mentioned