S1 Dataset -

Aims and objectives
To assess the effect of an instructional WhatsApp group on self-care and HbA1c levels among female patients with type 2 diabetes mellitus (T2DM).
Background
T2DM is a chronic disease that requires effective self-care. WhatsApp is a free application that can be effectively used for patient education.
Design
This study used a quasi-experimental design.
Methods
A convenience sample of 62 female participants was recruited from the medical outpatient clinic of a tertiary hospital. The Diabetes Self-Care Scale was used to assess the self-care profiles of the participants pre- and post-intervention. HbA1c samples were also collected at baseline and three months after receiving instructions from the WhatsApp group. Sociodemographic and clinical data were collected during the pre-intervention stage.
Results
The mean HbA1c level decreased from 8.61 ± 1.70 to 7.92 ± 1.60 after implementing the WhatsApp group instructions; the values showed a significant difference (t-value = 5.107 and P-value < 0.001). The post-test mean score of total self-care was higher than the pre-test mean score (t-value = 12.359, P-value <0.001), indicating a highly significant difference.
Conclusions
The study demonstrated that the instructional WhatsApp group is an effective method for improving self-care and HbA1c levels in patients with T2DM. This study suggests the use of WhatsApp group instructions as a teaching method in the healthcare system for the education and follow-up of patients with T2DM.
Relevance to clinical practice
The findings support the need to initiate effective and dynamic interventional follow-ups through WhatsApp groups for patients with T2DM to improve their self-care and HbA1c levels and ultimately reduce the burden on hospitals and governments.