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. 2019 Nov 27;2019(11):CD012631. doi: 10.1002/14651858.CD012631.pub2
Baseline imbalance
Low risk: no baseline imbalance in important characteristics was noted.
Unclear risk: baseline characteristics were not reported.
High risk: baseline imbalance was due to chance or was due to imbalanced exclusion after randomization.
Grade
L / U / H
Support for judgement