Table 1.

Applications for different systematic review of reviews

No.	Type of systematic review of reviews	Applications
1	Systematic review of intervention reviews	To summarise evidence from more than one systematic review of different interventions for the same condition or problem. To summarise evidence from more than one systematic review of the same intervention for the same condition or problem where different outcome To summarise evidence from more than one systematic review of the same intervention for the same condition or problem where different outcomes. To summarise evidence from more than one systematic review of the same intervention for different conditions, problems or populations. To summarise evidence about adverse effects of an intervention from more than one systematic review of use of the intervention for one or more conditions.
2	Systematic review of prognosis/prevalence reviews	To summarise evidence about prognosis/ prevalence from more than one systematic review.
3	Systematic review of diagnostic test accuracy reviews	To summarise evidence from more than one systematic review of diagnostic test accuracy assessing the same medical test to address the same condition or problem.
4	Systematic review of risk factors reviews	These overviews incorporate disease etiology or risk factors when the risks of interest may not directly relate to prognostic variables or risk prediction models.
5	Systematic review of descriptive reviews	To summarise evidence from more than one systematic review of descriptive reviews to address the descriptive results of review studies.
6	Systematic review of qualitative reviews	To summarise systematic review evidence relating to qualitative views or experiences. There is clear guidance available on the good conduct of an overview of qualitative syntheses.