Characteristic | % (n) |
---|---|
Research institute | |
 Tertiary hospital | 91.3 (285) |
 Secondary hospital | 1.6 (5) |
 Scientific research institution | 1.3 (4) |
 Others | 5.8 (18) |
Study design | |
 Parallel assignment | 54.2 (169) |
 Crossover assignment | 34.9 (109) |
 Single group assignment | 10.9 (34) |
Randomization status | |
 Randomized | 90.4 (282) |
 Non-randomized | 9.6 (30) |
Blinding status | |
 Open label | 57.1 (178) |
 Single blind | 4.2 (13) |
 Double blind | 38.8 (121) |
No. of centers | |
 Single center trial | 45.5 (142) |
 Multiple center trial | 54.5 (170) |
Control type | |
 Active drug | 49.4 (154) |
 Placebo control | 33.7 (105) |
 Blank control | 0.6 (2) |
 Uncontrolled | 16.3 (51) |
Sample size | |
  < 100 participants | 50.0 (156) |
 100–499 participants | 34.0 (106) |
  > 500 participants | 11.9 (37) |
 Unclear | 4.2 (13) |
Has enrolled participants | |
 Yes | 43.3 (135) |
 No | 56.7 (177) |
DMC has been established | |
 Yes | 17.0 (53) |
 No | 83.0 (259) |
Insurance has been purchased | |
 Yes | 48.4 (151) |
 No | 51.6 (161) |