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 | Â | Â |
  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 | Â | Â |
  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 | Â | Â |
  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 | Â | Â |
  Yes | 32.1 (34.3) | 0.000 |
  No (reference category) | 25.5 (27.6) |  |