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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) |
