Dosage Parameters in Pediatric Outcome Studies Reported in 9 Peer-Reviewed Occupational Therapy Journals from 2008 to 2014: A Content Analysis

Table 3

Levels of evidence.

Level of evidence
Level I: randomized control trials	14
Level II: cohort study, controlled trials not randomized	27
Level III: case-control study	26
Level IV: case-series, single-subject design	51
Level V: case report	6