Knowledge and attitude change as predictors of metabolic improvement in diabetes education.

Randomized trials of formal diabetes education have proven that education in isolation from other aspects of diabetes care has limited impact on metabolic control through the simple transfer of information. Comprehensive programme evaluation requires assessment of the process by which knowledge and attitude change affect subsequent control of diabetes. This study examined the impact of a formal diabetes education programme on diabetes-specific knowledge and attitude, and the relationship between these characteristics and metabolic control of the disease over a 15-month period. Knowledge and attitude were assessed using parallel forms of the DKN and ATT39 scales presented randomly as pre-test and post-test to 309 patients attending a 2-day diabetes education programme. Mean knowledge scores increased by 25% (P less than 0.0001) and standardized ATT scores showed a small but significant positive shift after the programme (P less than 0.01) and remained stable in a subset of 177 patients at 3-month follow-up. ATT scores showed a marked convergence towards normal during the intervention (ANOVA, P less than 0.0001). Glycosylated haemoglobin (HbAlc), a medium-term measure of blood glucose control, was recorded in 209 cases for 6 months preceding the programme, and for 15 months following, at intervals of 3 months. The mean HbAlc improvement, from 11.3 to 9.0% (P less than 0.001), was predicted by stepwise regression from initial diabetes control (57% variance) and psychosocial factors (17% variance) including attitude scores and personality characteristics. Diabetes knowledge did not predict improvement in the control of diabetes.