2.1 Search strategy
Based on Preferred Reporting Items for Systematic Reviews and
Meta-Analysis (PRISMA), we did our study (39). Databases of PubMed, Web
of Science, Embase, and Scopus were searched from 2000 to July 10, 2018.
The searches were not limited by language (studies in other languages
were omitted due to incompatibility with the aim of this study).
The searches were done using the keywords of mobile health (m-health)
and GDM. For the purpose of this review, m-health was defined as the use
of technology to provide healthcare for patients with GDM using short
message service (SMS), mobile application, and telemedicine system based
on smartphones.
The stages for building the search query for the PubMed database are
shown in table 1. With respect to the instructions provided for each
database, equivalent searches were then performed. Findings of each
study were analyzed, relevant information was extracted, and finally
obtained data were synthesized. The objectives and findings of each
study are summarized in table 2.