The intervention was brief, with a 90-min single session that allocated 60 min to diet
content and 30 min to exercise content, and effectively improved food label reading and
diet adherence at 3 months postintervention. Brief interventions have effectively improved diet outcomes and, consistent with our findings, were less effective in improving physical
activity (Clark, Hampson, Avery, & Simpson, 2004). Although the intervention group’s
HbA1c improved from baseline to follow-up, adjusted follow-up HbA1c values did not
differ between the intervention and control groups. In a meta-analysis of 72 diabetes
education interventions, patient contact was the only significant predictor of changes in
HbA1c, with 23.6 hr of contact time needed for a clinically meaningful change of 1%
absolute decrease (Norris, Lau, Smith, Schmid, & Engelgau, 2002). If the intervention
group’s 0.48% absolute decrease in HbA1c is in fact the result of the intervention, then
it took only 1.5 hr of contact time to achieve it compared to the 11.8 hr suggested by
Norris et al. (2002).
The intervention was brief, with a 90-min single session that allocated 60 min to dietcontent and 30 min to exercise content, and effectively improved food label reading anddiet adherence at 3 months postintervention. Brief interventions have effectively improved diet outcomes and, consistent with our findings, were less effective in improving physicalactivity (Clark, Hampson, Avery, & Simpson, 2004). Although the intervention group’sHbA1c improved from baseline to follow-up, adjusted follow-up HbA1c values did notdiffer between the intervention and control groups. In a meta-analysis of 72 diabeteseducation interventions, patient contact was the only significant predictor of changes inHbA1c, with 23.6 hr of contact time needed for a clinically meaningful change of 1%absolute decrease (Norris, Lau, Smith, Schmid, & Engelgau, 2002). If the interventiongroup’s 0.48% absolute decrease in HbA1c is in fact the result of the intervention, thenit took only 1.5 hr of contact time to achieve it compared to the 11.8 hr suggested byNorris et al. (2002).
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