Bupassiri 2011 [34]
|
21 (8,319)
|
65 (16, 114)
|
0.01
|
5 (13,638)
|
0.83 (0.63, 1.09)
|
0.18
|
21 (8,319)
|
0.72 (0.58, 0.89)
|
< 0.01
| |
Crowther 2010 [35]
|
4 (417)
|
75 (−17, 167)
|
0.11
|
7 (1,452)
|
0.84 (0.68, 1.04)
|
0.12
|
4 (417)
|
0.99 (0.88, 1.06)
|
0.42
| |
Dodd 2010 [36]
|
2 (282)
|
−75 (−210, 61)
|
0.28
|
1 (49)
|
0.41 (0.04, 4.20)
|
0.45
|
2 (282)
|
1.33 (0.78, 2.26)
|
0.29
|
2/3 primary studies of mean birthweight outcome accessed
|
Gouin 2011 [37]
|
18 (6,855)
|
−441 (−532, −350)
|
< 0.01
|
19 (38,796)
|
2.86 (2.36, 3.48)
|
< 0.01
|
18 (6,855)
|
2.76 (2.12, 3.45)
|
0.01
| |
Gülmezoglu 2011 [38]
|
1 (208)
|
−100 (−240, 40)
|
0.16
|
1 (604)
|
1.38 (0.92, 2.06)
|
0.12
|
1 (208)
|
1.40 (0.87, 2.24)
|
0.16
| |
Kawai 2011 [39]
|
13 (35,015)
|
45 (28, 62)
|
< 0.01
|
13 (35,015)
|
0.92 (0.83, 1.02)
|
0.09
|
13 (35,015)
|
0.82 (0.75, 0.91)
|
< 0.01
|
13/15 primary studies accessed
|
Kenyon 2010 [40]
|
13 (6,480)
|
49 (14, 85)
|
0.01
|
2 (4,876)
|
1.00 (0.96, 1.04)
|
0.94
|
13 (6,480)
|
0.99 (0.99, 1.00)
|
0.53
| |
Ladhani 2011 [41]
|
4 (880)
|
−279 (−485, −74)
|
0.01
|
2 (26,026)
|
3.28 (2.25, 4.78)
|
< 0.01
|
4 (880)
|
2.41 (1.42, 4.09)
|
< 0.01
| |
Lamont 2011 [42]
|
1 (485)
|
−12 (−128, 104)
|
0.89
|
2 (876)
|
0.96 (0.62, 1.47)
|
0.83
|
1 (485)
|
1.03 (0.77, 1.38)
|
0.84
| |
Mathanga 2011 [43]
|
2 (640)
|
121 (27, 214)
|
0.01
|
2 (624)
|
0.80 (0.54, 1.18)
|
0.25
|
2 (640)
|
0.75 (0.60, 0.94)
|
0.01
| |
McDonald 2010 [44]
|
9 (5,225)
|
−120 (−248, 6.8)
|
0.06
|
9 (5,225)
|
0.92 (0.72, 1.16)
|
0.46
|
9 (5,225)
|
1.12 (0.99, 1.26)
|
0.07
|
9/10 primary studies accessed
|
Murphy 2011 [45]
|
8 (179,589)
|
−121 (−199, −43)
|
< 0.01
|
12 (1,110,176)
|
1.45 (1.21, 1.73)
|
< 0.01
|
8 (179,589)
|
1.46 (1.10, 1.94)
|
0.01
| |
Reveiz 2011 [46]
|
3 (237)
|
15 (−111, 142)
|
0.81
|
1 (100)
|
Not estimated
|
NA
|
3 (237)
|
0.95 (0.59, 1.52)
|
0.83
|
Zero cases of LBW in both treatment arms of primary study
|
Salmasi 2010 [47]
|
44 (71,663)
|
13 (−105, 131)
|
0.83
|
18 (40,790)
|
1.09 (0.88, 1.35)
|
0.44
|
44 (71,663)
|
0.98 (0.77, 1.23)
|
0.85
|
18/19 primary studies of LBW outcome accessed
|
Whitworth 2010 [48]
|
5 (23,213)
|
11 (−20, 41)
|
0.49
|
8 (19,337)
|
1.04 (0.82, 1.33)
|
0.73
|
5 (23,213)
|
0.97 (0.87, 1.08)
|
0.56
| |
Wiysonge 2011 [49]
|
3 (1,809)
|
68 (19, 118)
|
0.01
|
4 (2,606)
|
0.83 (0.68, 1.01)
|
0.07
|
3 (1,809)
|
0.84 (0.74, 0.95)
|
0.01
| |
|
Number of studies (sample size)
|
Mean difference (g) (95% CI)
|
P
-value
|
Number of studies (sample size)
|
OR (95% CI)
|
P-
value
|
Number of studies (sample size)
|
Distributional OR (95% CI)
|
P
-value
| |
Pope 2010 [50]
|
5 (13,955)
|
100 (73, 128)
|
< 0.01
|
8 (Unclear)
|
1.38 (1.25, 1.52)
|
< 0.01
|
5 (13,955)
|
0.81 (0.76, 0.86)
|
< 0.01
|
Pooled published pre-calculated estimates for LBW outcome (that is Log(OR) and SE)
|
Salvig 2010a[51]
| | | | | | | | | | |
(Fixed effects model)
|
4 (1,187)
|
66 (1.6, 131)
|
0.04
|
3 (785)
|
0.98 (0.66, 1.46)
|
0.93
|
4 (1,187)
|
0.81 (0.65, 1.01)
|
0.07
| |
Salvig 2010a[51]
| | | | | | | | | | |
(Random effects model)
|
4 (1,187)
|
68 (−75, 212)
|
0.35
|
3 (785)
|
0.95 (0.49, 1.85)
|
0.88
|
4 (1,187)
|
0.79 (0.48, 1.29)
|
0.34
| |