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Table 1 Quality assessment of studies according to the Newcastle-Ottawa Scale

From: Coronary collaterals and risk for restenosis after percutaneous coronary interventions: a meta-analysis

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

*

*

 

*

 

*

*