Table 2

Assessments of methodological quality (N = 300)

Methodological Quality Indicator

N (%)


Jadad

Mean (SD)

2.6 (1.2)

Median (range)

2 (0 - 5)


Allocation Concealment

Adequate

65 (21.7)

Unclear

227 (75.7)

Inadequate

8 (2.7)


Risk of Bias

Low

23 (7.7)

Unclear

99 (33.0)

High

178 (59.3)


CONSORT Statement

Items fully addressed (median, range)

15 (4-22)

Items partially addressed (median, range)

5 (0-14)

Items not addressed (median, range)

2 (0-7)


Trial registered

Declared in publication

37 (12.3)

Registration found online

69 (23.0)


Study protocol available from corresponding author

2/290 (0.7)


Hamm et al. BMC Pediatrics 2010 10:96   doi:10.1186/1471-2431-10-96

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