PDA-assisted low glycemic index dietary intervention for type II diabetes: a pilot study

UMMS Affiliation

Department of Medicine, Division of Preventive and Behavioral Medicine; Department of Medicine, Division of Cardiovascular Medicine

Publication Date


Document Type



Adult; Aged; Blood Glucose; *Computers, Handheld; Diabetes Mellitus, Type 2; Dietary Carbohydrates; Female; *Glycemic Index; Hemoglobin A, Glycosylated; Humans; Male; Middle Aged; Pilot Projects; Randomized Controlled Trials; Treatment Outcome


Community Health and Preventive Medicine | Dietetics and Clinical Nutrition | Life Sciences | Medicine and Health Sciences | Women's Studies


BACKGROUND: Epidemiological and dietary intervention studies suggest that a low-glycemic index (GI) diet is beneficial for blood glucose control; however, long-term clinical utility of the low GI diet has not been fully investigated.

OBJECTIVES: To evaluate the feasibility and efficacy of a nutritionist-delivered low-GI dietary intervention, with the support of a personal digital assistant (PDA), for adult patients with poorly controlled type II diabetes.

METHOD: The low-GI intervention consisted of six counseling sessions and the use of a PDA-based food database with GI scores for 6 months. Study outcomes included feasibility measures, glycosylated hemoglobin levels (HbA1c), GI and glycemic load (GL) score of self-reported dietary intake, body weight, depression and quality of life (QOL). Measures were obtained at baseline, 3 and 6 months.

RESULTS: Of 31 adult patients approached, 15 met study eligibility criteria and were enrolled in the study. Thirteen patients (87%) completed all study assessments. Findings included decreases in average HbA1c (-0.5% P = 0.02), body weight, hip circumference, blood pressure, dietary GI and daily caloric intake. Diabetes impact scores also decreased. All but one participant completed all components of the intervention. There were mixed reports regarding the usefulness of the PDAs; however, participants offered helpful suggestions for further development.

CONCLUSIONS: Results of this pilot study support the feasibility of implementing a nutritionist-delivered, PDA-assisted low-GI dietary intervention for patients with poorly controlled type II diabetes. Encouraging initial efficacy data require further testing in the context of a randomized clinical trial.

DOI of Published Version



Eur J Clin Nutr. 2006 Oct;60(10):1235-43. Epub 2006 May 17. Link to article on publisher's website

Journal/Book/Conference Title

European journal of clinical nutrition

Related Resources

Link to article in PubMed

PubMed ID