Efficacy of adjuvant radiotherapy for treatment of adrenocortical carcinoma: a retrospective study and an updated meta-analysis

Table 3 Methodological quality of the studies included in the meta-analysis

First author	Representativeness of the exposed cohort	Selection of the unexposed cohort	Ascertainment of exposure	Outcome of interest not present at start of study	Control for important factors or additional factors	Outcome assessment	Follow-up long enough for outcomes to occur	Adequacy of follow-up of cohorts	Total quality score
Fassnacht	☆	☆	☆	☆	☆	☆	☆	-	7
Habra	☆	☆	☆	☆	☆	☆	☆	-	7
Sabolch	☆	☆	☆	☆	☆	☆	☆	-	7
Srougi	☆	☆	☆	☆	☆	☆	☆	-	7
Gharzai	☆	☆	☆	☆	☆	☆	☆	☆	8
Zhu	☆	☆	☆	☆	☆	☆	☆	-	7

ISSN: 1748-717X