Table 3

Characteristics of the randomised controlled trials

ItemNumber
Year of publication
 200647
 200727
 200831
 20092
Region where the study was carried out
 Africa6
 Asia28
 Australia8
 Western Europe25
 USA and Canada34
 South and Middle America3
 Worldwide3
Drug studies (according to ATC classification)
 A (alimentary tract)13
 B (blood)1
 C (cardiovascular system)2
 H (hormones)14
 J (anti-infectives)15
 L (antineoplastic and immunomodulating agents)5
 N (nervous system)32
 P (antiparasitic)6
 R (respiratory system)19
  • ATC, Anatomical Therapeutical Code.