Source of funding
|
25 (50)
|
19 (73)
|
44 (58)
|
Conflict of interest
|
22 (44)
|
12 (46)
|
34 (45)
|
Heterogeneity investigated
|
32 (64)
|
15 (58)
|
47 (62)
|
Meta-analysis results reported
|
22 (44)
|
10 (38)
|
32 (42)
|
Updated reviews
|
6 (12)
|
7 (27)
|
13 (17)
|
Publication bias
|
25 (50)
|
13 (50)
|
38 (50)
|
Limitations discussed
|
2 (4)
|
14 (54)
|
16 (21)
|
Critically appraised abstracts
|
0 (0)
|
22 (85)
|
22 (29)
|
Interpretation consistent with results
|
21 (42)
|
8 (31)
|
29 (38)
|
Provided quantitative summary of quality or reporting across reviews
|
29 (58)
|
16 (62)
|
45 (59)
|