Table 1.

Quality indicator score for registrations.

Question	Relevant area of registration form (http://www.researchregistry.com/browse-the-registry.html#home/addregistration/)
1. Who did the research?	Primary investigator
2. Where did they do the research?	Participating institutions Countries recruiting
3. Why did they do it?	Key questions and objectives
4. What did they do? This can be expanded to include the PICO items.	Patient population Intervention Control or comparator Primary outcomes (and secondary if used)
5. When did they do it?	Dates of enrollment