Sat13November1123AM 10

What is the level of evidence obtained from a meta-analysis of randomised controlled trials?

(Please select 1 option)

IIb Incorrect answer selected

Ib

IIa

Ia This is the correct answer

III

Explanation

Levels of evidence are:

Ia - Evidence obtained from meta-analysis of randomised controlled trials

Ib - Evidence obtained from at least one RCT

IIa - Evidence obtained from at least one well-designed controlled study without randomisation

IIb - Evidence obtained from at least one other type of well-designed quasi-experimental study

III - Well-designed non-experimental studies

IV - Expert committee reports, opinions of experts.