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Table 2 Jadad score assessing the quality of the 18 studies

From: The impact of long-term school-based physical activity interventions on body mass index of primary school children – a meta-analysis of randomized controlled trials

Study

Was the study described as randomized?

Was the method used to generate the sequence of randomization described and appropriate?

Deduct one point if the method used to generate the sequence of randomization was described and it was inappropriate.

Was the study described as double blind?

Was there a description of withdrawals and dropouts?

Was the method of double blinding described and appropriate?

Deduct one point if the study was described as double blind but the method of blinding was inappropriate.

Aguilar,2010 [44]

1

1

0

0

1

0

0

Ahamed,2007 [43]

1

0

0

0

1

0

0

Angelopoulos,2009 [41]

1

1

0

0

0

0

0

Caballer,2003 [47]

1

1

0

0

1

0

0

Donnelly,2009 [48]

1

0

0

0

1

0

0

Dzewaltowski,2010 [50]

1

1

0

0

1

0

0

Graf,2008 [45]

1

0

0

0

1

0

0

Jiang,2007 [52]

1

0

0

0

1

0

0

Kriemler,2010 [40]

1

1

0

0

1

0

0

Li,2010 [51]

1

0

0

0

1

0

0

Llargues,2011 [37]

1

0

0

0

1

0

0

Llargues,2012 [38]

1

0

0

0

1

0

0

Lohoman,2003 [49]

1

0

0

0

1

0

0

MacKelvie,2004 [39]

1

1

0

0

1

0

0

Magnusson,2012 [42]

1

0

0

0

0

0

0

Manios,2002 [33]

1

0

0

0

1

0

0

Nader,1999 [34]

1

0

0

0

1

0

0

Tarro,2014 [46]

1

0

0

0

1

0

0