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Table 1 Number of high-quality, clinically relevant articles in the top 20 clinical journals for 2000

From: What do evidence-based secondary journals tell us about the publication of clinically important articles in primary healthcare journals?

Journal title Number of articles with abstracts (from MEDLINE) Number of articles evaluated Number of pass articles / number evaluated (% pass) NNR* for number evaluated SCI Impact Factor** for 2000
Cochrane Database of Systematic Reviews 1004 444 422 (95.0) 1.1 Not available
Lancet 669 3858 134 (3.5) 28.8 10.2
Journal of Clinical Oncology 445 650 100 (15.4) 6.6 8.8
BMJ 209 3428 93 (2.7) 36.9 5.3
Circulation 925 1351 92 (6.8) 14.7 10.9
Journal of Advanced Nursing 341 611 92 (15.1) 6.6 0.77
Obstetrics and Gynecology 389 478 88 (18.4) 5.4 2.0
JAMA 329 1930 87 (4.5) 22.2 16.4
New England Journal of Medicine 228 1530 83 (5.4) 18.4 29.5
Archives of Internal Medicine 340 620 81 (13.1) 7.7 6.1
Journal of the American College of Cardiology 514 707 76 (10.7) 9.3 7.1
Pediatrics 548 811 76 (9.4) 10.7 4.8
American Journal of Cardiology 631 850 72 (8.5) 11.6 2.7
American Journal of Obstetrics and Gynecology 539 704 72 (10.2) 9.8 2.5
Critical Care Medicine 340 977 70 (7.2) 14.0 3.8
Chest 589 882 66 (7.5) 13.4 2.5
Stroke 402 609 59 (9.7) 10.3 6.0
Neurology 814 1334 58 (4.3) 23.0 4.8
American Journal of Gastroenterology 474 923 56 (2.8) 16.6  
Diabetes Care 263 529 55 (10.4) 9.6 5.0
Average    7.3% 13.8  
  1. *The NNR is the number of articles that would have to be read in each journal to identify one with high quality methods that is clinically relevant; **The SCI Impact Factor is the Science Citation Index Impact Factor (rating of how important each journal is in relation to citations). Data are for 2000. Articles have not been screened for direct clinical relevance beyond basic criteria of having at least one clinically important outcome.