[Summary text]
Selection bias (biased allocation to interventions) due to inadequate generation of a randomised sequence
Concerns about (i) the fixed block size within centres (which it might have been easy to
deduce, despite the blinding)
Selection bias (biased allocation to interventions) due to inadequate concealment of allocations prior to assignment
Concerns about (ii) the rather informal use of text messages to implement allocations.
Performance bias due to knowledge of the allocated interventions by participants and personnel during the study
Detection bias due to knowledge of the allocated interventions by outcome assessors
Attrition bias due to amount, nature or handling of incomplete outcome data
Reporting bias due to selective outcome reporting
Bias due to problems not covered elsewhere in the table