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Table 1 Characteristics of practice guidelines: reporting of conflicts of interest.

From: Reporting of conflicts of interest in guidelines of preventive and therapeutic interventions

   Conflicts of interest Conflicts of interest Exact
   reported not reported p-value
   N = 7 N = 184  
Journal NEJM 0 7 0.026
  JAMA 4 31  
  Lancet 0 9  
  Annals 2 31  
  BMJ 1 17  
  Pediatrics 0 89  
Year 1979 0 22 <0.001
  1984 0 40  
  1989 0 47  
  1994 0 42  
  1999 7 33  
Disclosure policy Yes 7 108 0.043
  No 0 76  
Focus Therapy 1 59 0.14
  Prevention 3 100  
  Both 3 25  
Main country Europe 1 25 1.00
  America 6 159  
Group Authorship Yes 6 155 1.00
  No 1 29  
Drug Intervention* Yes 2 50 1.00
  No 5 134  
Funding Government 1 39 <0.001
  Private 2 9  
  University 0 35  
  Other† 1 98  
  Mixed† 3 3  
Authors ‡ 1-2 1 30 0.004
  3-9 2 22  
  10-17 3 2  
  1. P-values are based on Fisher's exact test. * emphasis placed on medications rather than on vaccines, devices, surgical interventions, nutritional interventions, counseling, screening, rehabilitation and other non-pharmaceutical interventions † other sources of funding include mostly professional organizations (American College of Physicians, American Academy of Pediatrics, American Medical Association); mixed source of funding is defined as a combination of two or more of the four categories of funding ‡ n=60 for this analysis; 30 guidelines did not have group authorship and another 30 guidelines specified specific individuals who were primarily responsible for writing the manuscript, even if group authorship was mentioned