EFFECT OF A TEXT MESSAGE INTERVENTION ON DIETARY BEHAVIOURS IN HEMODIALYSIS: SECONDARY ANALYSIS OF KIDNEYTEXT TRIAL

 

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https://storage.unitedwebnetwork.com/files/1099/a4a76ce5e75439318e13813caaf36c5a.pdf
EFFECT OF A TEXT MESSAGE INTERVENTION ON DIETARY BEHAVIOURS IN HEMODIALYSIS: SECONDARY ANALYSIS OF KIDNEYTEXT TRIAL

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Jessica
Dawson
Jessica Dawson jessica.dawson@sydney.edu.au The University of Sydney NHMRC Clinical Trials Centre Sydney Australia *
Brendan Smyth brendan.smyth@sydney.edu.au The University of Sydney NHMRC Clinical Trials Centre Sydney Australia -
Armando Teixeira-Pinto armando.teixeira-pinto@sydney.edu.au The University of Sydney Centre for Kidney Research Sydney Australia -
Katrina Campbell katrina.campbell@uq.net.au The University of Queensland Create Health Advisory Brisbane Australia -
Allison Jaure allison.jaure@sydney.edu.au The University of Sydney Centre for Kidney Research Sydney Australia -
Jonathan Craig jonathan.craig@flinders.edu.au Flinders University College of Medicine and Public Health Adelaide Australia -
Clara Chow clara.chow@sydney.edu.au The University of Sydney Westmead Applied Research Centre Sydney Australia -
Meg Jardine meg.jardine@sydney.edu.au The University of Sydney NHMRC Clinical Trials Centre Sydney Australia -
Vincent Lee vincent.lee@sydney.edu.au The University of Sydney Westmead Applied Research Centre Sydney Australia -
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Nutritional management is a key component of treatment in hemodialysis, however, is often complex and difficult for people to understand and implement. Mobile phone-based interventions are increasingly of interest as they offer a low-cost, scalable tool to support dietary behavior change. The aim of this secondary analysis of the KIDNEYTEXT trial is to evaluate the impact of a text-based messaging intervention on nutrition-related clinical parameters and the consumption of key nutrients and core food groups (CFG). These findings will be used to refine future dietary interventions.

KIDNEYTEXT was a 6-month randomized controlled trial comparing the effect of usual care (control) to usual care plus semi-personalized text messages (three per week). Dietary intake was assessed using 24-hour recall at baseline and six months. Targets for nutrients were compared against hemodialysis guidelines (energy, protein and sodium) and compared to targets outlined in the Australian Guide to Healthy Eating for other nutrients. Between-group comparisons employed chi-square tests for categorical dietary variables and either independent samples t-tests (normal distributions) or Mann-Whitney U tests (non-normal distributions) for continuous variables.

130 participants (87 intervention, 43 control) were recruited from six dialysis units in Sydney, of whom 115 (88%) completed the study. There was a significant mean difference in interdialytic weight gain (IDWG) at 6-months (-0.37kg/session, 95% CI -0.74, -0.005; p=0.047), with the intervention arm demonstrating improved IDWG compared to the control arm. There were significant mean differences at 6-months in the intake of single nutrients, including sodium (-313mg, 95% CI -625, -1.1; p=0.047), potassium (-10mmol, 95% CI -18, -2; p=0.016), phosphorus (-236mg, 95% CI -401, -70; p=0.006), total energy (-237kcal, 95% CI -405, -69; p=0.006), protein (-13g, 95% CI -23, -2; p=0.017), fat (-11g, 95% CI -20, -0.6), carbohydrate (-23g, 95% CI -45, -0.15; p=0.049) and fiber (-3g, 95% CI -6, -0.4; p=0.023). Whilst the intake of several single nutrients declined, this was not translated to changes in serves of CFGs, except for a reduction in serves of discretionary foods (-0.5, 95% CI -0.8, -0.2; p=0.003) and serves of vegetables (-1, 95% CI -1.7, -0.2; p=0.012).




A simple text message intervention achieved modest changes in key nutrition parameters among people receiving haemodialysis. While reductions in some parameters may be beneficial, unintended changes, such as a decline in protein and fibre intake, were also observed. Notably fluid management improved following the 6-month text message intervention, with reductions in both IDWG and dietary sodium intake, supporting biological plausibility. Text messages may be an effective adjunctive dietary intervention to support complex behaviour change. These results need confirmation in a larger trial. 

Kewords