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Table 2 Methodological quality assessment of the included systematic reviews using the AMSTAR tool

From: Performance of Harmonic devices in surgical oncology: an umbrella review of the evidence

Review (year)

1

2

3

4

5

6

7

8

9

10

11

Rating

Population: gastric cancer patients

 Sun (2015) [24]

No

Yes

Yes

No

No

Yes

Yes

Yes

Yes

Yes

Yes

8

 Cheng (2015) [12]

No

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

9

 Chen (2014) [23]

No

Yes

Yes

No

No

Yes

Yes

No

Yes

Yes

Yes

7

Population: breast cancer patients

 Huang (2015) [13]

No

CA

Yes

No

No

Yes

Yes

Yes

Yes

Yes

Yes

7

 Cheng (2016) [21]

No

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

No

Yes

8

 Currie (2012) [22]

No

CA

Yes

Yes

No

Yes

Yes

Yes

Yes

No

Yes

7

Population: oral, head, and neck cancer patients

 Ren (2015) [14]

No

No

Yes

No

No

Yes

Yes

Yes

Yes

Yes

Yes

7

Population: colon cancer patients

 Allaix (2016) [28]

No

Yes

No

No

No

Yes

No

NA

NA

No

Yes

3

 Di Lorenzo (2012) [29]

No

Yes

No

No

No

Yes

No

NA

Yes

No

Yes

4

 Tou (2011) [30]

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

10

  1. All 11-items were scored as “Yes,” “No,” “Can’t Answer” (CA), or “Not Applicable” (NA). AMSTAR comprises the following items:
  2. 1. “A priori” design provided;
  3. 2. Duplicate study selection/data extraction;
  4. 3. Comprehensive literature search;
  5. 4. Status of publication as inclusion criteria (i.e., gray or unpublished literature);
  6. 5. List of studies included/excluded provided;
  7. 6. Characteristics of included studies documented;
  8. 7. Scientific quality assessed and documented;
  9. 8. Appropriate formulation of conclusions (based on methodological rigor and scientific quality of the studies);
  10. 9. Appropriate methods of combining studies (homogeneity test, effect model used and sensitivity analysis);
  11. 10. Assessment of publication bias (graphic and/or statistical test); and
  12. 11. Conflict of interest statement