Table 1

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

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


*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.

McKibbon et al. BMC Medicine 2004 2:33   doi:10.1186/1741-7015-2-33

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