|
General
| |
|
Duration of review
| |
| |
>6 months
|
3 (4 %)
|
| |
≤6 months
|
19 (23 %)
|
| |
Not reported
|
60 (73 %)
|
|
Published protocol
| |
| |
Mentioned
|
2 (2 %)
|
| |
Not mentioned
|
80 (98 %)
|
|
Review question
| |
| |
Clearly reported
|
81 (99 %)
|
| |
Unclear/inferred
|
1 (1 %)
|
|
Identifying relevant studies
| |
|
Databases searched
| |
| |
Searched more than one database
|
67 (82 %)
|
| |
Searched one database only
|
2 (2 %)
|
| |
Used a previous review(s) as starting point
|
8 (10 %)
|
| |
Not reported
|
5 (6 %)
|
|
Grey literature
| |
| |
Searched grey literature
|
57 (70 %)
|
| |
No grey literature search
|
20 (24 %)
|
| |
Not reported
|
5 (6 %)
|
|
Search strategy
| |
| |
Clearly reported
|
64 (78 %)
|
| |
Unclear
|
7 (9 %)
|
| |
Not reported
|
11 (13 %)
|
|
Scanned references
| |
| |
Yes
|
41 (50 %)
|
| |
No
|
8 (10 %)
|
| |
Not reported
|
33 (40 %)
|
|
Contacted authors
| |
| |
Yes
|
18 (22 %)
|
| |
No
|
9 (11 %)
|
| |
Not reported
|
55 (67 %)
|
|
Limits applied
| | |
|
Date
| | |
| |
No limit
|
10 (12 %)
|
| |
Limited by date
|
56 (68 %)
|
| |
Not reported
|
16 (20 %)
|
|
Language
| | |
| |
No limit
|
14 (17 %)
|
| |
Limited by language
|
40 (49 %)
|
| |
Not reported
|
28 (34 %)
|
|
Selecting relevant studies
| |
|
Titles and abstracts
| |
| |
Two or more independent reviewers
|
28 (34 %)
|
| |
One reviewer and one verifier
|
4 (5 %)
|
| |
One reviewer only
|
15 (18 %)
|
| |
Done but unclear number of reviewers
|
20 (24 %)
|
| |
Not done
|
1 (1 %)
|
| |
Not reported
|
14 (17 %)
|
|
Full-texts
| | |
| |
Two or more independent reviewers
|
20 (24 %)
|
| |
One reviewer and one verifier
|
5 (6 %)
|
| |
One reviewer only
|
9 (11 %)
|
| |
Done but unclear number of reviewers
|
23 (28 %)
|
| |
Not done
|
1 (1 %)
|
| |
Not reported
|
24 (29 %)
|
|
Data abstraction and quality appraisal
| |
|
Data abstraction
| |
| |
Two or more independent reviewers
|
8 (10 %)
|
| |
One reviewer and one verifier
|
19 (23 %)
|
| |
One reviewer only
|
6 (7 %)
|
| |
Done but unclear number of reviewers
|
30 (37 %)
|
| |
Not done
|
1 (1 %)
|
| |
Not reported
|
18 (22 %)
|
|
Quality appraisal
| |
| |
Two or more independent reviewers
|
14 (17 %)
|
| |
One reviewer and one verifier
|
11 (13 %)
|
| |
One reviewer only
|
6 (7 %)
|
| |
Done but unclear number of reviewers
|
24 (29 %)
|
| |
Not done
|
6 (7 %)
|
| |
Not reported
|
21 (26 %)
|
|
Data synthesis
| | |
|
Data synthesis
| | |
| |
Meta-analysis or clear reasons for not pooling results
|
18 (22 %)
|
| |
Narrative/descriptive summary only
|
64 (78 %)
|
