The Journal of Korean Physical Therapy

Table. 2. Table 2

Qualitative level classification

Level of evidence	Research type	N	%
I	Systemic review Meta-analyses Randomized
	Controlled trials	-	-
II	Two groups non-randomized	1, 2, 3, 5, 6,	62.5
III	One groups non-randomized	4, 7, 8	37.5
IV	Single subject designs surveys	-	-
V	Case report narrative literature review
	Qualitative researches	-	-
Total		8	100