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Table 2 Agreed results of AMSTAR-2 for fibromyalgia

From: A comparison of two assessment tools used in overviews of systematic reviews: ROBIS versus AMSTAR-2

Author (date), CAM 1. Were PICO components listed? 2. Protocol reported? Any deviations justified? 3. Study design justified? 4. Comprehensive literature search? 5. Was study selection performed in duplicate? 6. Was data extraction performed in duplicate? 7. List of excluded studies? Were these justified? 8. Characteristics of studies provided in detail?
Fibromyalgia
Multiple cam therapies
  Holdcraft 2003 [14] No No No No No No No No
  Baronowsky 2009 [15] No No Yes No No No No No
  Terhorst 2011, 2012 [16, 17] Yes No No No Yes No No No
  De Silva 2010 [18] No No No No Yes Yes No No
Homoeopathy
  Perry 2010 [19] Yes No No PY Yes Yes No PY
  Boehm 2014 [20] No No No PY Yes Yes No Yes
Chiropractic treatment
  Ernst 2009 [21] Yes No No No No Yes No No
Acupuncture
  Mayhew and Ernst 2007 [22] No No No PY No Yes No PY
  Daya 2007 [23] No No No PY No No No PY
  Langhorst 2010 [24] Yes No No PY Yes Yes No Yes
  Martin-Sanchez 2009 [25] Yes No No PY No No No No
  Cao 2013 [26] Yes No No PY yes Yes No Yes
  Deare 2013 [13] Yes Yes No Yes Yes Yes Yes Yes
  Yang 2014 [27] Yes No No PY Yes Yes No No
Herbal medicines
  de Souza Nascimento 2013 [28] Yes No yes No No Yes No PY
Colic
Multiple cam therapies
  Perry 2011 [29] Yes PY No PY PY Yes No Yes
  Bruyas-Bertholon 2012 [30] No No No No No No No PY
  Harb 2016 [31] Yes No No No Yes Yes No PY
  Gutierrez-Castrellon 2017 [32] Yes No No No No No No No
Manipulation therapies
  Dobson 2012 [33] Yes Yes No Yes Yes Yes Yes Yes
  Gleberzon 2012 [34] No No No PY No Yes No PY
  Carnes 2017 [35] No PY No PY Yes Yes No PY
Acupuncture
  Skejeie 2018 [36] Yes PY No Yes Yes Yes No Yes
Herbal medicines
  Anheyer 2017 [37] No No No No No Yes No Yes
Probiotics
  Sung 2013 [38] Yes No No No Yes Yes Yes PY
  Anabrees 2013 [39] Yes PY No PY No Yes No Yes
  Urbanska 2014 [40] Yes No No PY No No No PY
  Xu 2015 [41] No No No PY Yes Yes No Yes
  Schreck Bird 2017 [42] Yes No No No Yes No No Yes
  Dryl 2018 [43] Yes No No No No No No PY
  Sung 2018 [44] Yes PY No PYb No No No No
9. Risk of bias assessed? 10. Sources of funding of included studies? 11. Methods used to combine the findings of studies appropriate? Test on heterogeneity? 12. If meta-analysis performed was RoB accounted for? 13. Was RoB discussed in individual studies? 14. Was there discussion of any heterogeneity observed in the results? 15. If a quantitative synthesis, was publication bias investigated and discussed in relation to the results? 16. Reviewers’ conflict of interests stated? Confidence in the review
Fibromyalgia
Multiple cam therapies
PY No No MA No MA Yes   No MA No CL
No No No MA No MA Yes No No MA No CL
Yes No No No No No No Yes CL
No No No MA No MA Yes Yes No MA Yes CL
Homoeopathy  
Yes No No MA No MA Yes Yes No MA Yes CL
Yes No Yes No No Yes No Yes CL
Chiropractic treatment  
No No No MA No MA Yes No No MA Yes CL
Acupuncture  
No NO No MA No MA Yes Yes No MA Yes CL
PY No No MA No MA No No No MA No CL
Yes No Yes Yes Yes Yes No No CL
No No No No No Yes No Yes CL
Yes No Yes No Yes Yes Yes Yes CL
Yes Yes Yes Yes Yes Yes No Yes Low
Yes No No No No Noa Yes No CL
Herbal medicines  
Yes No No MA No MA No No No MA Yes CL
Colic
Multiple cam therapies
Yes No No MA No MA Yes No No MA Yes Low
PY No No MA No MA No No No MA No CL
Yes No Yes Yes Yes No Yes Yes CL
No No No No Yes No Yes No CL
Manipulation therapies  
Yes No Yes Yes Yes Noa Yes Yes High
No No No MA No MA Yes No No MA No CL
Yes No No No No No No No CL
Acupuncture
Yes No Yes Yes Yes Yes No Nod Low
Herbal medicines
Yes No No MA No MA No No No MA Yes CL
Probiotics
Yes No Yes No Yes No No Yes CL
Yes No Yes No Yes Yes No Yes Low
Yes Yes No No No No No No CL
Yes No Yes No No No No Yes CL
Yes No No No No No No No CL
Yes No No No No No No No CL
Yes No Yes Yes Yes Yes Yes Noc Low
  1. CL critically low, PY partial yes, MA meta-analysis, PICO participants, intervention, comparator, outcomes, RoB risk of bias
  2. aToo few studies to perform a test of heterogeneity
  3. bNot fully searched and search conducted Dec 2014
  4. cConflict of interest occurred but no indication of how it was dealt with
  5. dAll included studies were by the author team but did not indicate how this was dealt with
  6. Italicised columns represent the critical domains (see Appendix, Table 15)