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M. Grant S, J. Glenn A, M. S. Wolever T, G. Josse R, L. O’Connor D, Thompson A, D. Noseworthy R, Seider M, Sobie M, Bhatti G, Cavanagh J, Jones E, B. Darling P. Evaluation of Glycemic Index Education in People Living with Type 2 Diabetes: Participant Satisfaction, Knowledge Uptake, and Application. Nutrients 2020; 12:E2416. [PMID: 32806563 PMCID: PMC7469042 DOI: 10.3390/nu12082416] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/30/2020] [Accepted: 08/07/2020] [Indexed: 12/13/2022] Open
Abstract
The glycemic index (GI) has been included in the Canadian clinical practice guidelines for type 2 diabetes (T2D) management since 2003, and even longer in other parts of the world (e.g., Australia). Despite this, dietitians have reported that GI is "too difficult for patients to understand and apply." They have called for diverse GI-utility data and evidence-informed education materials. To address these concerns, we developed and evaluated a GI education workshop and supporting materials, using the Kirkpatrick Model, for a T2D population. Participants (n = 29) with T2D attended a dietitian-facilitated workshop and received education materials. A mixed-form questionnaire (GIQ) and 3-day-diet-record were used to capture patient demographics, satisfaction, knowledge, and application, prior to and immediately after the workshop, 1-week, and 4-weeks post-education. Dietary GI was significantly lower at 1 and 4 weeks post-education (mean ± SEM; both 54 ± 1), compared to pre-education (58 ± 1; p ≤ 0.001). Participants (28/29) were satisfied with the intervention. The GI knowledge score was significantly higher post-education at baseline (83.5 ± 3.4%; p ≤ 0.001), week one (87.5 ± 2.6%; p = 0.035), and week four (87.6 ± 3.8%; p = 0.011) when compared to pre-education (53.6 ± 5.1%). A significant reduction in dietary GI was achieved by participants living with T2D, after completing the workshop, and they were able to acquire and apply GI knowledge in a relatively short period.
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Affiliation(s)
- Shannan M. Grant
- Department of Applied Human Nutrition, Mount Saint Vincent University, 166 Bedford Highway, Halifax, NS B3M 2J6, Canada
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- Clinical Nutrition and Risk Factor Modification Centre, St. Michael’s Hospital, 61 Queen Street E, Toronto, ON M5C 2T2, Canada
- Nutrition Department, St Michael’s Hospital, 61 queen St. E, Toronto, ON M5B 1W8, Canada; (M.S.); (G.B.); (J.C.); (E.J.)
| | - Andrea J. Glenn
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- Clinical Nutrition and Risk Factor Modification Centre, St. Michael’s Hospital, 61 Queen Street E, Toronto, ON M5C 2T2, Canada
| | - Thomas M. S. Wolever
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
| | - Robert G. Josse
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- Clinical Nutrition and Risk Factor Modification Centre, St. Michael’s Hospital, 61 Queen Street E, Toronto, ON M5C 2T2, Canada
- Division of Endocrinology and Metabolism, St. Michael’s Hospital, 61 Queen St. E, Toronto, ON M5C 2T2, Canada
| | - Deborah L. O’Connor
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- Physiology and Experimental Medicine Program, Hospital for Sick Children, 555 University Avenue, Toronto, ON M5G 1X8, Canada
| | - Alexandra Thompson
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- Clinical Nutrition and Risk Factor Modification Centre, St. Michael’s Hospital, 61 Queen Street E, Toronto, ON M5C 2T2, Canada
| | - Rebecca D. Noseworthy
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- Clinical Nutrition and Risk Factor Modification Centre, St. Michael’s Hospital, 61 Queen Street E, Toronto, ON M5C 2T2, Canada
| | - Maxine Seider
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- Clinical Nutrition and Risk Factor Modification Centre, St. Michael’s Hospital, 61 Queen Street E, Toronto, ON M5C 2T2, Canada
| | - Melissa Sobie
- Nutrition Department, St Michael’s Hospital, 61 queen St. E, Toronto, ON M5B 1W8, Canada; (M.S.); (G.B.); (J.C.); (E.J.)
| | - Gurita Bhatti
- Nutrition Department, St Michael’s Hospital, 61 queen St. E, Toronto, ON M5B 1W8, Canada; (M.S.); (G.B.); (J.C.); (E.J.)
| | - Julianne Cavanagh
- Nutrition Department, St Michael’s Hospital, 61 queen St. E, Toronto, ON M5B 1W8, Canada; (M.S.); (G.B.); (J.C.); (E.J.)
| | - Emily Jones
- Nutrition Department, St Michael’s Hospital, 61 queen St. E, Toronto, ON M5B 1W8, Canada; (M.S.); (G.B.); (J.C.); (E.J.)
| | - Pauline B. Darling
- Department of Nutritional Sciences, University of Toronto, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (A.J.G.); (T.M.S.W.); (R.G.J.); (D.L.O.); (A.T.); (R.D.N.); (M.S.); (P.B.D.)
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1N 7K4, Canada
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Effect of ethnicity on glycaemic index: a systematic review and meta-analysis. Nutr Diabetes 2015; 5:e170. [PMID: 26168085 PMCID: PMC4521176 DOI: 10.1038/nutd.2015.21] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 05/31/2015] [Indexed: 11/08/2022] Open
Abstract
Objectives: Low glycaemic index (GI) foods are recommended to improve glycaemic control in diabetes; however, Health Canada considers that GI food labeling would be misleading and unhelpful, in part, because selected studies suggest that GI values are inaccurate due to an effect of ethnicity. Therefore, we conducted a systematic review and meta-analysis to compare the GI of foods when measured in Caucasians versus non-Caucasians. Methods: We searched MEDLINE, EMBASE and Cochrane databases for relevant articles. GI differences were aggregated using the generic inverse variance method (random effects model) and expressed as mean difference (MD) with 95% confidence intervals (95% CI). Study quality was assessed based on how well studies complied with official international GI methodology. Results: Review of 1288 trials revealed eight eligible studies, including 28 comparisons of GI among 585 non-Caucasians and 971 Caucasians. Overall, there was borderline significant evidence of higher GI in non-Caucasians than Caucasians (MD, 3.3 (95% CI, −0.1, 6.8); P=0.06) with significant heterogeneity (I2, 46% P=0.005). The GI of eight types of rice was higher in non-Caucasians than Caucasians (MD, 9.5 (95% CI, 3.7, 23.1); P=0.001), but there was no significant difference for the other 20 foods (MD, 1.0 (95% CI, −2.5, 4.6); P=0.57). MD was significantly greater in the four low-quality studies (nine comparisons) than the four high-quality studies (19 comparisons; 7.8 vs 0.7, P=0.047). Conclusions: With the possible exception of rice, existing evidence suggests that GI values do not differ when measured in Caucasians versus non-Caucasians. To confirm these findings high-quality studies using a wide range of foods are required.
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