Table 1

Characteristics of included sources

NPer cent
Total117100.0
Disease
 Cardiovascular disease32.6
 Non-specific2218.8
 Oncology6555.6
 Orthopaedics32.6
 Pain21.7
 Palliative care65.1
 Women's health32.6
 Other1311.1
Publication type
 Discussion/review6454.7
 Guideline32.6
 Meta-analysis21.7
 Original research3025.6
 Systematic review97.7
 Text book65.1
 Other32.6
Year of publication (range)
 1988–198932.6
 1990–19994034.2
 2000–20094740.2
 2010–20152723.1