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Table 2 Newcastle-Ottawa Quality Assessment Scale

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

Study Year Representativeness of the exposed cohort Selection of the non-exposed cohort Ascertainment of exposure Demonstration that outcome of interest was not present at the start of study Comparability of cohorts on the basis of the design or analysis Assessment of outcome
Burke et al. 2011 * * * *   *
Boulis et al 2013    * *   *
Brouillet et al 2014 * * * * * *
Carbone et al 2008   * * *   *
Ebbing et al 2013 * * * * * *
Eddleman et al 1992 * * * * * *
Esakoff et al 2015 * * * *   *
Feldman et al 2004 * * * *   *
Hasegawa et al 2006 * * * *   *
Hasegawa et al 2009 * * * *   *
Heinonen et al 1996 * * * *   *
Pinar et al 2014    * *   *
Raisanen et al 2012 * * * *   *
Suzuki et al 2015 * * * * * *
Tantbirojn et al 2009    * *   *
Uyanwah-Akpom et al 1977 * * * *   *
Yerlika et al 2016 * * * * * *
  1. Burke et al. [14]; Boulis et al. [24]; Brouillet et al. [25]; Carbone et al. [23]; Ebbing et al. [6]; Eddleman et al. [10]; Esakoff et al. [7]; Feldman et al. [17]; Hasegawa et al. 2006 [18]; Hasegawa et al. 2009 [19]; Heinonen et al. [20]; Pinar et al. [15]; Raisanen et al. [8]; Suzuki et al. [21]; Tantbirojn et al. [16]; Uyanwah-Akpom et al. [9]; Yerlika et al. [22]