Table 2.
Risk-of-bias analysis using successive inclusion criteria
Criteria | Studies (Effects) | Estimate [SE] | 95% CI | I2 | |
---|---|---|---|---|---|
All studies | 28 (76) | 0.35 [0.09] | [0.16, 0.54] | 0.40 | 78% |
+ Low ROB outcome reporting | 18 (49) | 0.32 [0.09] | [0.14, 0.50] | 0.25 | 59% |
+ Low ROB sequence generation | 11 (28) | 0.27 [0.13] | [−0.01, 0.56] | 0.33 | 65% |
+ Low ROB allocation concealment | 5 (15) | 0.10 [0.07] | [−0.12, 0.31] | 0.00 | 0% |
+ Overall attrition < 10% | 2 (3) | 0.16 [0.03] | [−0.19, 0.50] | 0.00 | 0% |
Note: ROB = risk-of-bias.