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Table 1 Characteristics of included studies

From: Abnormal placental cord insertion and adverse pregnancy outcomes: a systematic review and meta-analysis

Study The setting (center) PCI categorization Design Comparison groups No of participants Study Duration Outcomes
Burke 2011 [14] Maternity Unit, University Maternity Hospital, Limerick, Ireland Gross examination Prospective cohort MCI, VCI vs. normal PCI 727 not specified SGA, Em CD
Boulis 2013 [24] Obstetrics Dept, LIJ School of Medicine, Long Island, New York, USA Existing data Retrospective cohort MCI, VCI vs. CDC database 122 2002–2012 PTB, SGA, Em CD, IUFD
Brouillet 2014 [25] Obstetrics Dept, Grenoble University Hospital, France Existing data Retrospective cohort Central PCI vs. Peripheral (MCI, VCI and paracentral PCI) 528 Aug 2006 - Dec 2006 SGA
Carbone 2008 [23] Obstetrics Dept, Hartford Hospital, Connecticut, USA Existing data Case-control MCI vs. normal PCI 282 Nov 2005 – Feb 2008 PTB
Ebbing 2013 [6] Medical Birth Registry of Norway Existing data Retrospective cohort VCI vs. non-VCI, MCI vs. non-MCI 634,741 1999–2009 PTB, SGA, Low BW, Em CD, IUFD
Eddleman 1992 [10] Obstetrics Dept, The Mount Sinai School of Medicine, New York, USA Existing data Retrospective cohort VCI vs. non-VCI 15,942 Jan 1985 - Dec 1988 PTB, SGA, Low BW
Esakoff 2015 [7] California Birth Statistics Existing data Retrospective cohort VCI vs. non-VCI 482,812 Jan 2006 - Dec 2006 PTB, SGA, Em CD, IUFD
Feldman 2004 [17] Obstetrics Dept, Hartford Hospital, Connecticut, USA Sonography Case-control MCI vs. normal PCI 75 Jan 2002 - Dec 2003 PTB, Low BW,
Hasegawa 2009 [19] Obstetrics Dept, Showa University Hospital, Tokyo, Japan Existing data Retrospective cohort MCI, VCI vs. normal PCI 556 June 2005 - Dec 2006 Em CD
Hasegawa 2006 [18] Obstetrics Dept, Showa University Hospital, Tokyo, Japan Sonography prospective cohort MCI, VCI vs. normal PCI 3446 Sept 2002 - June 2004 Em CD
Heinonen 1996 [20] Obstetrics Dept, University Hospital of Kuopio, Finland Existing data Retrospective cohort VCI vs. non-VCI 12,750 July 1989 - Dec 1993 PTB, SGA, Low BW, Em CD, IUFD
Pinar 2014 [15] Perinatal Pathology, Women and infants Hospital, Rhode Island, USA Gross examination Case-control VCI vs. non-VCI 1718 Mar 2006 - Sept 2008 IUFD
Raisanen 2012 [8] Obstetrics Dept, University Hospital of Kuopio, Finland Existing data Retrospective cohort VCI vs. non-VCI 26,849 2000–2011 PTB, SGA, Low BW, Em CD, IUFD
Suzuki 2015 [21] Obstetrics Dept, Japanese Red Cross Katsushika Maternity Hospital, Tokyo Existing data Prospective cohort VCI vs. non-VCI 16,965 2002–2011 PTB, SGA, Em CD
Tantbirojn 2009 [16] Pathology Dept, Brigham and Women’s Hospital, Boston, MA, USA Gross examination Case-control MCI, VCI vs. normal PCI 541 1987–2007 IUFD
Uyanwah-Akpom 1977 [9] Pathology Dept, St Mary’s Hospital, Manchester, UK Existing data Prospective cohort Normal PCI vs. Peripheral PCI 1000 not specified SGA, IUFD
Yerlikaya 2016 [22] Obstetrics Dept, Medical University of Vienna, Austria Existing data Case-control VCI vs. non-VCI 216 Jan 2003 - Dec 2013 IUFD
  1. BW birthweight, Em CD emergency cesarean delivery, IUFD intrauterine fetal death, MCI marginal cord insertion, PCI placental cord insertion, PTB preterm birth, SGA small for gestational age, VCI velamentous cord insertion