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Table 1 Results of the quality assessment of the 22 included articles

From: Prevalence and incidence of musculoskeletal extremity complaints in children and adolescents. A systematic review

Author and year of publication Study Participation Study Attrition Outcome Measurement Statistical Analysis and Reporting Risk of bias assessment
General population studies
 Abujam et al. 2014 [49] No N/A Yes Yes High
 Adams et al. 2013 [35] Yes N/A Yes Yes Low
 Auvinen et al. 2009 [50] No N/A Partly Yes High
 Bishop et al. 2012 [51] No N/A Yes Yes High
 Diepenmaat et al. 2006 [36] Yes N/A Yes Yes Low
 Ehrmann Feldman et al. 2002 [37] Yes Yes Partly Yes Low
 El-Metwally et al. 2006 [15] Yes N/A Yes Yes Low
 Hoftun et al. 2011 [38] Yes N/A Yes Yes Low
 Hulsegge et al. 2011 [47] Partly Yes Partly Yes Medium
 Jespersen et al. 2014 [14] Yes Yes Yes Yes Low
 Jespersen et al. 2015 [39] Yes N/A Yes Yes Low
 Krul et al. 2009 [40] Yes N/A Yes Yes Low
 Mikkelsson et al. 1997 [41] Yes N/A Yes Yes Low
 Molgaard et al. 2011 [48] Partly N/A Yes Yes Medium
 Rathleff et al. 2013 [42] Yes N/A Yes Yes Low
 Shrier et al. 2001 [43] Yes Yes Partly Yes Low
 Slowinska et al. 2015 [68] No N/A Yes Partly High
 Smedbraten et al. 1998 [52] No N/A Yes Yes High
 Verhagen et al. 2009 [54] Yes No Yes Yes High
Clinical studies
 Bot et al. 2005 [44] Yes N/Aa Yes Partly Low
 Henschke et al. 2014 [45] Yes N/Aa Yes Yes Low
 Van der Waal et al. 2006 [46] Yes N/Aa Yes Yes Low
  1. aAttrition bias may be present, but very small. If present, it will be on general practitioners level, and not on patient level