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Table 3 Categorical variables predicting citations to systematic reviews (mean number of citations and adjusted odds ratios) a

From: Bibliometrics of systematic reviews: analysis of citation rates and journal impact factors

Variables

Mean number of citations (±SD)

P-value

Country location of first author

  

  United States

36.5 (37.4)

0.000

  The Netherlands

29.0 (34.3)

 

  Canada

24.4 (24.6)

 

  United Kingdom

23.8 (25.9)

 

  Australia

23.0 (19.5)

 

  All other countries (reference category)

22.1 (23.4)

 

ICD-10 chapters

  

  Neoplasms

31.8 (30.9)

0.000

  Mental and behavioural disorders

29.5 (27.7)

 

  Diseases of the circulatory system

29.1 (31.5)

 

  Factors influencing health status and contact with health services

26.0 (31.1)

 

  Diseases of the digestive system

17.0 (18.7)

 

  All other ICD-10 codes (reference category)

26.2 (28.8)

 

Intervention type

  

  Investigations, diagnostics or screening

34.7 (34.8)

0.009

  Drugs and vaccines

27.8 (30.4)

  Not an intervention

26.9 (29.2)

  Health promotion

25.2 (25.3)

  Surgery and dentistry

21.7 (22.2)

  Other treatments (reference category)

23.6 (26.8)

International collaboration

  

  Yes

32.1 (34.3)

0.000

  No (reference category)

25.5 (27.6)

 
  1. aICD-10, International Statistical Classification of Diseases and Related Health Problems, 10th Revision.