Table 3.

Study details and characteristics extraction

Domain/subdomain	Description
General document details
1.1 Publication year	Year of publication
1.2 Country and location	Country of publication
Study references
2.1 Research objective	What were the research objectives?
2.2 Research questions	What were research questions in the systematic review?
2.3 Context/setting	What was the context/setting of this study?
2.4 Orthotic treatment	What were orthotic designs/treatments?
2.5 Outcome	What were the main outcomes of interest?
2.6 Important results	What were the main results of the study? Were there any important subgroup analysis?
2.7 Limitations	What were the limitations of this study?
Grey literature references
3.1 Target audience	Was there a target audience for the specified grey literature?
3.2 Context/setting	What was the context/setting of the specified grey literature?
3.3 Orthotic treatment	What were orthotic designs/treatments?
3.4 Outcome	What were the main outcomes of interest?
3.5 Important results	What were the main results of the study? Were there any important subgroup analysis?