Studies
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
---|
Turley et al. [26]
|
√
|
√
|
√
|
–
|
×
|
√
|
√
|
√
|
×
|
√
|
–
|
Appleton et al. [25]
|
√
|
√
|
?
|
–
|
×
|
√
|
?
|
√
|
×
|
√
|
–
|
Egan et al. [28]
|
√
|
√
|
√
|
–
|
×
|
×
|
?
|
√
|
?
|
√
|
–
|
Ma et al. [11]
|
√
|
√
|
√
|
–
|
×
|
√
|
√
|
√
|
?
|
√
|
–
|
Chen et al. [27]
|
√
|
√
|
√
|
–
|
×
|
×
|
?
|
√
|
?
|
√
|
–
|
- 1–11 represents the 11 items of the AHRQ recommended criteria
- “√” means “yes”, “×” means “no”, “?” means “unclear”, “–” means “not suitable”