Table 2.

Methodologic Quality of Included Systematic Reviews

AMSTAR Question	Deasy 20109	Faddy 200513	Green 2009a10	Green 2009b11	Howes 200415	Lamond 20108	Leroy 201019	Mace 200417	Migita 200612	Mistry 200514	NICE 201020	Pedersen 201316	Symington 200618	Jameson 20117
1. Was an a priori design provided?	No	No	Yes	Yes	No	No	No	No	No	No	Yes	No	No	No
2. Was there duplicate study selection and data extraction?	No	Can't answer	Can't answer	Can't answer	Can't answer	No	No	No	Yes	No	No	No	No	No
3. Was a comprehensive literature search performed?	Yes	No	No	No	Yes	No	Yes	No	Yes	No	Yes	No	No	No
4. Did the authors search for reports regardless of the publication status?	Can't answer	Can't answer	No	No	Can't answer	No	Can't answer	No	Yes	No	No	No	No	Can't answer
5. Was a list of studies (included and excluded) provided?	No	No	No	No	No	No	No	No	Yes	No	No	No	No	No
6. Were the characteristics of the included studies assessed and documented?	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes
7. Was the scientific quality of the included studies assessed and documented?	No	Yes	No	No	No	Yes	No	Yes	No	No	Yes	No	No	No
8. Was the scientific quality of the included studies used appropriately in formulating conclusions?	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Yes	No	Yes	No
9. Were the methods used to combine the findings of studies appropriate?	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
10. Was the likelihood of publication bias assessed?	No	No	No	No	No	No	No	No	No	No	No	No	No	No
11. Was the conflict of interest stated?	No	No	No	No	No	No	No	No	No	No	Yes	No	No	No
Total score	4	4	4	4	4	3	3	4	7	2	7	1	3	2