|
Disease area of included trials |
||
| Disease area |
Number of papers |
Percent |
|
|
||
| Digestive system diseases |
50 |
16.3 |
| Circulatory system diseases |
48 |
15.6 |
| Tumours* |
42 |
13.7 |
| Urogenital system diseases |
37 |
12.1 |
| Nervous system diseases |
16 |
5.2 |
| Motor system diseases |
16 |
5.2 |
| Healthy population |
15 |
4.9 |
| Respiratory system diseases |
15 |
4.9 |
| Endocrine system diseases |
12 |
3.9 |
| Immune system diseases |
9 |
2.9 |
| Others |
47 |
15.3 |
|
|
||
| Total |
307 |
100.0 |
|
*All types/locations of tumours | ||
Zhang et al. Trials 2008 9:22 doi:10.1186/1745-6215-9-22 |
||