Table 1

Quality assessment of studies according to the Newcastle-Ottawa Scale

Lead author

Representativeness

Control group

Ascertainment

Endpoint not present at start

Assessment of outcome

Follow-up duration

Adequacy follow-up


Probst

*

*

*

*

*

Nakae

*

*

*

*

*

Wahl

*

*

*

*

*

*

Perera

*

*

*

*

*

*

*

Jensen

*

*

*

*

*

*

*

Lee

*

*

*

*

*

*

*

Antoniucci

*

*

*

*

*


Meier et al. BMC Medicine 2012 10:62   doi:10.1186/1741-7015-10-62

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