TABLE 1.
Levels | Types of literature |
---|---|
Level 1 | Systematic review |
Level II-1 | Randomised control trials |
Level III-1 | Pseudo-randomised controlled trial |
Level III-2 | Comparative study with concurrent controls |
Level III-3 | Comparative study without concurrent controls |
Level IV | Case series/studies with either post-test or pre-test/post-test outcomes |
Source: Abdullah et al. 2012