Fig 1.
From: Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group (2009). Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement. PLoS Med 6(7): e1000097. doi:10.1371/journal.pmed1000097. For more information, visit www.prisma-statement.org.
Table 1.
Two-way text message trials set in Africa.
Fig 2.
Overview of two-way text message trials in Africa according to clinical area and trial status.
Fig 3.
*Empty cell: No risk of bias assessment—Attrition bias was not assessed for trials that only reported “appointment attendance” as an outcome as incomplete data is an integral part of this outcome.
Fig 4.
Effect of two-way text messages versus standard care on appointment attendance.
Fig 5.
Effect of two-way text messages versus standard care on medicine adherence.