A one-off advice session is unlikely to provide sufficient support for people who have recently been diagnosed with type-2 diabetes, experts say.
Researchers at the University of Leicester analysed the progress of 731 patients, all of whom had recently learnt they had type-2 diabetes, over a three-year period.
Half of the patients completed a one-day self-management education programme (called Desmond), while the others received usual GP care.
After three years, patients who had attended the one-day advice session showed sustained improvements in four out of five health beliefs.
But there was no sustained improvement in biomedical or lifestyle outcomes for this group of patients.
The researchers, whose findings are published in the British Medical Journal, concluded that patients need ongoing clinical support, rather than one-off advice when they are first diagnosed.