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Table 1

Changes in HbA1c from baseline to study end from low- and high-glycemic index diets

Reference, number of subjects (n), and study lengthBaseline HbA1c: low- vs. high-GI dietStudy end HbA1c: low- vs. high-GI dietHbA1c changes from baseline with the implementation of the low-GI diet
Heilbronn et al. (4), n = 45, 4 wks on weight loss diet followed by 8 weeks on weight loss diets of low or high GI 6.7%, after 4 wks of     weight loss diets: 6.65 vs. 6.35% 6.04 vs. 6.06% After implementation of the GI diets, a 0.6% decrease in low GI, not significantly different than high-GI diet; no difference in weight loss from low- vs. high-GI diets 
Gilbertson et al. (10), n = 104, 52 weeks 8.3 vs. 8.6% 8.0 vs. 8.6% 0.3% decrease in low-GI group, although reported GIs were the same in both groups at study end 
Giacco et al. (11), n = 63, 24 weeks 8.8 vs. 8.8% 8.6% (compliant group) vs. 9.1% 0.2% decrease in low-GI compliant group 
Brand et al. (12), n = 16, 12 weeks 7.7 vs. 7.7% 7.0 vs. 7.9% 0.7% decrease in low-GI group 
Collier, et al. (12), n = 7, 6 weeks 10.0 vs. 9.9% 10.0 vs. 9.86% No difference at study end 
Reference, number of subjects (n), and study lengthBaseline HbA1c: low- vs. high-GI dietStudy end HbA1c: low- vs. high-GI dietHbA1c changes from baseline with the implementation of the low-GI diet
Heilbronn et al. (4), n = 45, 4 wks on weight loss diet followed by 8 weeks on weight loss diets of low or high GI 6.7%, after 4 wks of     weight loss diets: 6.65 vs. 6.35% 6.04 vs. 6.06% After implementation of the GI diets, a 0.6% decrease in low GI, not significantly different than high-GI diet; no difference in weight loss from low- vs. high-GI diets 
Gilbertson et al. (10), n = 104, 52 weeks 8.3 vs. 8.6% 8.0 vs. 8.6% 0.3% decrease in low-GI group, although reported GIs were the same in both groups at study end 
Giacco et al. (11), n = 63, 24 weeks 8.8 vs. 8.8% 8.6% (compliant group) vs. 9.1% 0.2% decrease in low-GI compliant group 
Brand et al. (12), n = 16, 12 weeks 7.7 vs. 7.7% 7.0 vs. 7.9% 0.7% decrease in low-GI group 
Collier, et al. (12), n = 7, 6 weeks 10.0 vs. 9.9% 10.0 vs. 9.86% No difference at study end 

GI, glycemic index.

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