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Table 2 Summary of the characteristics of the included studies

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

Lead author Year CCC assessment Setting Follow-up (months) PCI type Male (%) Age (years)
Probst 1991 Visually Elective 4 to 7 POBA 100% 79 51
Nakae 1996 Visually Acute MI Mean 5.7 POBA 100% 75 62
Wahl 2000 CFI Elective Mean 17 BMS 43% 74 60.5
Lee 2002 CFI Acute MI 6 BMS 74.3% 73 57
Antoniucci 2002 Visually Acute MI 6 BMS 64% 78 64
Perera 2006 CFI Elective 6 BMS 100% 80 60
Jensen 2007 CFI Elective 9 BMS 100% 75 61
  1. BMS, bare metal stents; CCC, coronary collateral circulation; CFI, collateral flow index (intracoronary wedge-pressure derived collateral assessment); PCI, percutaneous coronary intervention; POBA, plain balloon angioplasty; Visually, collateral assessment with Rentrop scoring system.