Table 2.

Description of topics of included references (only values above 5% are shown)

Department (N = 55)
Surgery	13 (24%)
Epidemiology	10 (18%)
Internal medicine	3 (5%)
Orthopedics	3 (5%)
Patient (N = 52)
Neoplasms	6 (12%)
Wounds and injuries	6 (12%)
Musculoskeletal diseases	5 (10%)
Cardiovascular diseases	5 (10%)
Nutritional and metabolic diseases	5 (10%)
Intervention (N = 31)
Chemicals and drugs category	12 (39%)
Surgical procedures, operative	8 (26%)
Food and beverages	2 (6%)
Biological factors	2 (6%)
Domain (N = 54)
Therapy	19 (35%)
Etiology	13 (24%)
Epidemiology	6 (11%)
Diagnosis	6 (11%)
Management	5 (9%)
Prognosis	5 (9%)
Study types (N = 58)
No limits mentioned	48 (83%)
RCTs	5 (9%)
RCTs and cohort studies/case control studies	5 (9%)