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Table 1 Literature overview of classification systems and the corresponding evidence of each criterion

From: Guidelines for laparoscopic treatment of ventral and incisional abdominal wall hernias (International Endohernia Society (IEHS)—Part 1

Author Years Type of study Oxford New classification Use of a classification Recurrence rating Morphology Size Risk factors Surgical procedure
Ammaturo and Bassi [51] 2005 Case series 4 X    X X   
Chevrel and Rath [52] 2000 Expert opinion 5 X       
Chowbey et al. [53] 2006 Expert opinion 5 X       
Conze et al. [54] 2005 Experimental 5     X    X
Conze et al. [55] 2007 Case series 4     X    X
Dietz et al. [56] 2007 Expert opinion 5 X       
Dietz et al. [57] 2012 Retrospective case–control 3   X X X X X  
Hadeed et al. [58] 2011 Case series 4 X       
Höer et al. [59] 2002 Outcome study 2c       X  
Jenkins et al. [14] 2010 Case series 4     X X X  
Kaafarani et al. [60] 2009 RCT 2B    X     
Kaafarani et al. [21] 2010 RCT 2B    X   X   
Kingsnorth [61] 2006 Review 5        X
Klinge et al. [62] 2001 Experimental 5       X  
Korenkov et al. [63] 2001 Expert opinion 5 X       
Leblanc et al. [64] 2001 Retrospective cohort 4      X   
Licheri et al. [65] 2008 Case series 4   X   X    
Losanoff et al. [66] 2007 Review 5     X    X
Martínez-Serrano et al. [67] 2010 Retrospective cohort 3       X  
Moreno-Egea et al. [68] 2007 Review 5     X    
Moreno-Egea et al. [69] 2008 NR-controlled trial 3     X    
Muysoms et al. [70] 2009 Expert opinion 5 X X X X X X  
Muysoms et al. [71] 2012 Expert opinion 5   X     X  
Parker et al. [72] 2011 Retrospective cohort 4      X   
Piardi et al. [73] 2010 Retrospective cohort 4     X X X  
Sanchez et al. [74] 2011 Review 5       X  
Sørensen et al. [75] 2005 Retrospective cohort 3       X  
Varnell et al. [15] 2008 Case series 4    X X X   
Veljkovic et al. [76] 2009 Case series 4       X  
Winkler et al. [77] 2008 Review 5   X X X X   X
  1. RCT randomized controlled trial, NR nonrandomized