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Table 1

Scoring of methodological quality of each article using grading criteria developed by Sackett 18

ARTICLE/CRITERIABronfort JMPT 2001Balon NEJM 1998Rowe Chiro Osteo 2006Browning Clin Chiro 2008Olafsdottir Arch Dis 2001Wiberg Nordsreen JMPT 1999Sawyer JMPT 1999Sandell JCM 2007Reed JMPT 1994Khorshid JSVR 2006Straub JMPT 2001Lebouef JMPT 1991Miller & Miller JMPT 2009Klougart JMPT 1989Wiberg JMPT 2010Miller JMPT 2008
ASSIGNMENT OF PATIENTS (/9)9979995977955544
BASELINE VALUES OF GROUPS (/8)8848488884080440
RELEVANCE OF OUTCOMES & CLINICAL SIGNIFICANCE (/7)7773737577757333
PROGNOSTIC STRATIFICATION (COMORBIDITY AND RISK FACTORS) (/6)6666666363066666
BLINDING STRATEGIES (/5)5353333200300000
CONTAMINATION/CO-INTERVENTION (/4)4344020000000000
COMPLIANCE OF SUBJECTS TO STUDY PROCEDURES (/4)3342222410410001
DROP-OUT RATES OF SUBJECTS (/3)3333333233003303
FOLLOW-UP LEVELS (/2)2212212012200010
DATE OF PUBLICATION (/1)1011100101101011
TOTAL (/50)48454241373736343327262522211918