Reports with refused interviews; n = 51 | Reports for which authors could not be contacted; n = 29 | Reports with successful interviews; n = 58 | |
---|---|---|---|
Sample size per study arm | |||
Less than 30 | 14, 27.5% | 3, 10.3% | 10, 17.2% |
30 to 60 | 32, 62.7% | 22, 75.9% | 39, 67.2% |
60 to 100 | 3, 5.9% | 3, 10.3% | 8, 13.8% |
More than 100 | 2, 3.9% | 1, 3.4% | 1, 1.7% |
Primary outcome between groups | |||
P < 0.05 | 35, 68.6%, | 21, 72.4% | 33, 56.9% |
P ≥ 0.05 | 16, 31.4% | 8, 27.6% | 22, 37.9% |
Others (multiple outcomes showed different results) | 0 | 0 | 3, 5.2% |
Assessed to be at low risk of bias based on published reports | |||
1. Sequence generation | 7, 13.7% | 4, 13.8% | 16, 27.6% |
2. Allocation concealment | 0 | 0 | 0 |
3. Blinding of at least one available object | 0 | 0 | 2, 3.4% |
4. Intention-to-treat analysis | 47, 92.2% | 25, 86.2% | 52, 89.7% |
5. Registered protocol | 0 | 0 | 0 |
Hospital’s level where the study was conducted | |||
Hospitals affiliated with medical universities | 2, 3.9%* | 7, 24.1% | 13, 22.4% |
Level 3 hospitals (including hospitals affiliated with medical universities) | 23, 45.1% | 15, 51.7% | 27, 46.6% |
Level 2 hospitals | 24, 47.1% | 9, 31.0% | 27, 46.6% |
Level 1 hospitals | 1, 2.0% | 0 | 1, 1.7% |
No information | 3, 5.9% | 5, 17.2% | 3, 5.2% |
Published in core journal | |||
Core Journal from list of Beijing University Library (2014 version) | 0 | 1, 3.4% | 2, 3.4% |
Core Journal from list of China Scientific and Technical Papers and Citations Database (2016 version) | 5, 9.8%* | 5, 17.2% | 21, 36.2% |