Summary:
In patients with type 2 diabetes, a lifestyle-based health promotion intervention significantly improved health behaviours and reduced irrational health beliefs and dysfunctional eating behaviours compared to a control group receiving no treatment, though it was associated with no reported side effects.
| PICO | Description |
|---|---|
| Population | Adults diagnosed with type 2 diabetes (total n=90), selected through convenience sampling and randomized into groups. |
| Intervention | Eight 90-minute sessions of a lifestyle-based health promotion intervention delivered to the experimental group. |
| Comparison | A control group (n=45) that did not receive any form of treatment or intervention. |
| Outcome | The intervention group demonstrated significant improvements in health-promoting behaviours and reductions in irrational health beliefs and maladaptive eating behaviours at post-test and 3-month follow-up, compared to the control group (P < .01). |
Clinical Context
Effective management of type 2 diabetes depends heavily on sustained patient behaviour, including diet, physical activity, medication adherence, and self-monitoring. Yet behaviour is shaped by underlying cognitions and habits: irrational or inaccurate health beliefs and maladaptive eating patterns can quietly undermine even well-designed medical regimens. Conventional diabetes care often emphasises pharmacotherapy and didactic advice while devoting less structured attention to the psychological drivers of self-care. Lifestyle-based health-promotion interventions aim to fill this gap by actively reshaping health behaviours, challenging unhelpful beliefs, and improving eating behaviour. This randomised controlled trial evaluated an eight-session programme in adults with type 2 diabetes, testing whether a structured behavioural approach can produce measurable and durable improvements in these self-management foundations.
Clinical Pearls
- Trial design: Ninety adults with type 2 diabetes were randomised, with 45 in the no-treatment control arm, and the intervention comprised eight 90-minute group sessions.
- Behaviour change: Health-promoting behaviours improved significantly in the intervention group versus control (P < .01), indicating the programme shifted day-to-day self-care.
- Cognitive and eating gains: The intervention significantly reduced irrational health beliefs and maladaptive eating behaviours (P < .01), targeting the cognitive drivers of poor self-management rather than diet alone.
- Durability and safety: Benefits were maintained at 3-month follow-up and the intervention reported no side effects, supporting it as a low-risk adjunct to standard care.
Practical Application
This trial supports embedding structured, behaviourally focused programmes alongside standard medical management of type 2 diabetes, rather than relying on brief advice alone. A practical model is a small-group course, here eight 90-minute sessions, that explicitly addresses health beliefs and eating behaviour in addition to general lifestyle counselling. Clinicians can operationalise this by referring patients to diabetes self-management education, behavioural medicine, or health-psychology services, and by reinforcing the targeted beliefs and eating patterns during routine reviews. The absence of side effects makes such programmes low-risk and broadly applicable. However, because the measured outcomes were behavioural and cognitive rather than glycaemic, clinicians should view the intervention as complementary to, not a substitute for, pharmacological and metabolic management.
Broader Evidence Context
These findings are consistent with the established evidence base for diabetes self-management education and support (DSMES), which professional guidelines, including those of the American Diabetes Association, recommend at diagnosis and at key points thereafter. A large literature shows that structured educational and behavioural interventions can improve self-care behaviours and psychosocial outcomes, although their effect on glycaemic endpoints such as HbA1c is more variable and often modest. By specifically targeting irrational health beliefs and maladaptive eating, this study aligns with cognitive and behavioural models of chronic-disease self-management. The results reinforce prior work suggesting that addressing the psychological and behavioural substrate of diabetes care complements, and may enhance, conventional metabolic treatment.
Study Limitations
- Participants were recruited by convenience sampling, which introduces selection bias and limits generalisability.
- The total sample of 90 is modest, reducing statistical power and the precision of the effect estimates.
- Follow-up extended only to 3 months, so the long-term durability of behaviour change is unknown.
- Outcomes were behavioural and cognitive self-reports rather than objective clinical endpoints such as HbA1c, weight, or cardiovascular risk.
- The use of an untreated control group, without an attention-matched comparator, may inflate apparent benefit through expectation and attention effects.
Bottom Line
An eight-session, lifestyle-based health-promotion programme significantly improved health behaviours and reduced irrational health beliefs and maladaptive eating in adults with type 2 diabetes, with gains maintained at three months and no side effects. The findings support integrating structured behavioural and educational interventions into routine diabetes care as a safe adjunct, while confirmation of effects on glycaemic and clinical outcomes awaits larger, longer studies.
Source: Mohammad Shayan Kolahdouzan, et al. “The effect of lifestyle-based health promotion intervention on health behaviour, irrational heath beliefs, and eating behaviour of patients with type 2 diabetes.” Read article here.
