Skip to main content

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.