Background
Mobile phone text message interventions have the potential to improve the health of people with type 2 diabetes at a population level. This study aimed to determine the effectiveness and acceptability of a mobile phone text message intervention (DTEXT) on diabetes control and self-management behaviours for Australian adults with type 2 diabetes.
Methods
A two-armed parallel non-blinded randomised control trial was conducted with 395 community dwelling adults with type 2 diabetes and HbA1c ≥7.0% (53 mmol/mol). Block randomisation occurred after completion of baseline measures. The control group received usual care, the intervention group received usual care and the automated six month text message intervention (daily messages for months 1-3, four messages per week for months 4-6). Pathology measures and self-report telephone surveys were assessed using intention to treat analysis. Generalised estimating equations determined between group changes in HbA1c at 3 and 6 months. Secondary outcomes included change in nutrition, physical activity, blood lipid profile, body mass index, quality of life, self-efficacy, medication adherence and program acceptability.
Results
No significant difference was observed between the intervention (n=197) or control group (n=198) for HbA1c at 3 months (-0.11%; CI -0.28, 0.07; d= -0.05, p=0.23) or 6 months (-0.13%; CI -0.33, 0.08; d= -0.05, p=0.22). A significant improvement in nutrition was seen with consumption of vegetables at 3 months (0.74 serves/day; 95%CI 0.34, 1.12; d =0.31, p<0.01) and 6 months (0.42 serves/day; 95% CI 0.03, 0.82; d =0.18, p=0.04); fruit at 3 months (0.21 serves/day; 95% CI 0.00, 0.41; d =0.09, p<0.05) and discretionary sweet foods at 3 months (-1.10 times/week; 95% CI -2.03, -0.16; d =-0.47, p=0.02). No other significant effects were seen at 3 months and 6 months. The intervention demonstrated high rates of acceptability (94.0%) and minimal withdrawal (1.5%).
Conclusions
A mobile phone text message intervention can improve some nutritional behaviours in people with type 2 diabetes, but does not significantly improve HbA1c or other health outcomes. DTEXT provides a highly accepted and potentially scalable form of self-management support that can complement existing diabetes care.
Trial Registration
Australian New Zealand Clinical Trials Registry, Trial ID: ACTRN12617000416392. Registered: 23 March 2017.