Table 3

Type of study design
83 Total Articles
Case Report = 12
Case Series = 6
Commentary/Expert Opinion = 12
Methodology = 1
Editorial = 1
Primary Research = 31 of which
2 = basic science
2 = program evaluation
2 = cohort study
6 = other study
9 = clinical trial
10 = survey
Narrative Review = 16
Systematic Review = 4

Coulter and Khorsan Chiropractic & Osteopathy 2008 16:14   doi:10.1186/1746-1340-16-14
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