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Table 2 Quality assessment using the New Castle-Ottowa scale

From: Perforator-based flaps for the treatment of burn scar contractures: a review

Study Year Study type Selection Comparability Outcome
Representativeness of the exposed cohort Selection of the non-exprosed cohort Ascertainment of exposure Outcome of interest not present at start Comparability of the cohorts Assessment of outcome Follow-up long enough Adequacy of follow-up of cohorts
Ogawa [11] 2004 Cohort—retrospective *       *  
Er [9] 2005 Cohort—pre-postoperative design *    *     
Tsai [17] 2006 Cohort—pre-postoperative design *   * *   * *  
Ogawa [16] 2006 Cohort—retrospective *       *  
Rashid [12] 2006 Cohort—pre-postoperative design *    *    * *
Waterson [18] 2008 Cohort—retrospective *       *  
Verhaegen [14] 2011 Cohort—pre-postoperative design *   * *   * *  
Tucker [13] 2011 Cohort—retrospective *        
Wang [15] 2014 Cohort—pre-postoperative design *      * * *
Li [10] 2015 Cohort—retrospective *    *   * * *
Stekelenburg [8] 2017 RCT * * * * * * * *
  1. A star (*) indicates that a measure was adequately addressed in this study. A study could be awarded a maximum of one star for each numbered item within the Selection and Exposure categories. A maximum of two stars could be given for Comparability.