Figure 1. PRISMA Flow diagram of search strategy.
The findings of the included studies with regard to efficacy of m-health interventions are summarized in Table 2.
Among the 27 studies, 26% (7/27) used smartphone, without referring to its type, 14.9% (4/27) used the SMS, 33.3% (9/27) used mobile-based applications, 18.5% (5/27) used telemedicine based on smartphones, and 7.1% (2/27) used SMS reminder system to investigate the efficacy of m-health interventions. Mostly, these studies supported the efficacy of m-health interventions (n=4) (40-43).