Methods	Individual Randomized Controlled Trial in Hospitals affiliated with Tehran University of Medical Sciences, Iran
Participants	Inclusion criteria: Pregnant women with gestational diabetes were enrolled in the study who had a gestational age of 28‐36 weeks and were admitted at one of three selected hospitals affiliated with Tehran University of Medical Sciences due to high blood sugar or diabetes diagnosis in 2012–2013. Other inclusion criteria were gestational, being literate, and lack of any known physical or mental disease that makes trainings impossible. Exclusion criteria: Women who received diabetes training before entering the study were excluded. Age [n (%)]—Control group, face‐to‐face training, training booklet 25 (30.14), 25 (30.93), 25 (30.744) Highschool education [n (%)]—Control group, face‐to‐face training, training booklet 24 (57.10), 24 (57.1), 22 (52.40) Average economic status [n (%)]—Control group, face‐to‐face training, training booklet 27 (64.20), 32 (76.20), 27 (64.30)
Interventions	Intervention—face‐to‐face training (n = 42) Description: In the intervention group, two training sessions were held on 2 consecutive days and each session took about 40 min. Training items that were taught in the second session were included; nutrition, physical activity and exercise, insulin injection, and following‐up after the pregnancy. Intervention—training booklet (n = 42) In the other intervention group, all the items taught by face‐to‐face training method were distributed in the form of an educational booklet, to be studied by the patients. Up to a week after the birth, the mothers were contacted by the researcher via phone to answer the questions, the mothers‚ medical records were also used, and then, the record sheet was completed by the researcher. Nutrition counseling messaging: Training items mentioned in the first session of the training included; a definition of gestational diabetes, causes, side effects, individuals at risk, and control and treatment of gestational diabetes such as glycemic control. Thus, in all three hospitals, mothers received comprehensive guidance on how to feed themselves by a dietitian. Intervention adapted to local context: Not reported Women empowerment approach: Unclear empowerment approach Control (n = 42) Description: In this study, the control group received routine hospital care and education.
Outcomes	Mode of delivery
Notes	Funding: This article was as a part of MSc thesis in midwifery approved by Tehran University of Medical Sciences in 2013 (approval code number: 0192‐99‐21969) and sponsored by the Nursing and Midwifery Care Research Center, Tehran University of Medical Sciences.