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. 2016 Sep 27;9(3):240–250. doi: 10.5005/jp-journals-10005-1371

Table 2: Analysis of studies

   Ravn3    Soporowski
etal11 		   Borum and
Andreasen14 		   Carvalho
etal16 		   Holan and
Ram17 		   Gondim and
Moreira Veto18 		   Spinas
et al19 		   Colak et al20    Altun et al21    Hirata et al25   
The study sample represents the population of interest    Unclear    Unclear    Unclear    Unclear    Unclear    Unclear    Unclear    Unclear    Unclear    Unclear   
Loss to follow up is unrelated to key characteristics    No    No    Yes    Yes    No    Yes    No    Yes    Yes    Yes   
The prognostic factor of interest is adequately measured    Unclear    Yes    No    Yes    Yes    Yes    No    Yes    Unclear    Yes   
The outcome of interest is adequately measured    Yes    Unclear    Yes    Yes    Yes    Yes    No    Yes    Yes    Yes   
Important potential confounders are appropriately accounted for    No    No    No    No    Yes    No    No    No    No    Yes   
The statistical analysis is appropriate for the design of the study    Unclear    Unclear    Unclear    Unclear    Yes    Unclear    Unclear    No    Yes    Yes   
Category and situation of the article    Low
methodology		    Low
methodology		    Low
methodology		    Moderate
methodology		    Moderate
methodology		    Moderate
methodology		    Low
methodology		    Moderate
methodology		    Moderate
methodology		    High
methodology