To determine the effect of online education given to individuals with newly diagnosed type 2 diabetes on metabolic control, self-care and health literacy. A randomized controlled trial. This study was conducted with 95 new diagnosed diabetes patients in the Endocrine Polyclinic of a university hospital. Personal Information Form, Diabetes Self-Care Activities Scale and Health Literacy Scale were used to evaluate the data. SPSS 21 program was used in the analysis of the data and a p<0.05 level was considered significant.

Participants were randomized into both groups (intervention and control). The Consolidated Standard of Reporting Trials-CONSORT 2010-guidelines were used to conduct a randomized controlled trial. Sample size was estimated using the G*POWER software tool, based on 80% power and 95% confidence interval. A minimum of 45 individuals in each group were needed to determine the difference in the mean of the measurements (10% more calculated for the probability of sample loss). Between the data collection dates, 248 patients were reached and invited to participate in this study. 78 patients did not meet the inclusion criteria and 70 patients refused to participate. A total of 100 eligible patients were randomized; 50 were assigned to the intervention group and 50 to the control group. After reaching the targeted number, data collection forms were filled in. The participants were then randomly randomized into control and intervention groups in the computer program. Until the randomization was made, it was not known in which groups the individuals were. Randomization was performed after the target number was reached. The first diabetes self-management training was given to all patients by diabetes education nurses face-to-face in the outpatient clinic.

After the study objectives were stated and informed consent was obtained from the study participants, face-to-face interviews by trained interviewers were used to complete the questionnaires. The interviews lasted 20-25 minutes.

Inclusion Criteria:

• Having a diagnosis of Type 2 diabetes mellitus for at most one year
• Be between the ages of 18-65
• Being on oral antidiabetic and/or insulin therapy
• Have a smart phone
• Volunteer to participate in the study
• Hearing that interferes with communication
• Sensory loss such as speech
• Psychiatric problem

Exclusion Criteria:

• Illiterate
• Have a physical, cognitive or mental disability to answer questions
• Individuals with type 2 DM who did not volunteer to participate in the study

All authors contributed to the interpretation, writing, and approval of the final manuscript.

They did not know if they were in the control and intervention group at the time of randomization.