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Reproducibility and validity of dietary glycemic index, dietary glycemic load, and total carbohydrate intake in 141 Swedish men.
Am J Clin Nutr 2007; 85(2):548-53AJ

Abstract

BACKGROUND

Although the associations of dietary glycemic index (GI) and dietary glycemic load (GL) with many chronic diseases have been examined in epidemiologic studies, information regarding the reproducibility and validity of these measures assessed with the use of food-frequency questionnaires (FFQs) is lacking.

OBJECTIVE

We examined the reproducibility and validity of dietary GI and dietary GL and of carbohydrate intake as assessed by using an FFQ.

DESIGN

Swedish men (n = 141) aged 40-74 y completed 2 FFQs 1 y apart and two 1-wk weighed diet records 6 mo apart. Dietary GI, dietary GL, and carbohydrate intake (starches and sugars) were calculated from both FFQs and diet records. We used intraclass correlations between the 2 FFQs to measure reproducibility and Pearson correlations between the diet records and the FFQs to assess the relative validity.

RESULTS

Reproducibility of the FFQs was 0.66 (95% CI: 0.56, 0.75) for dietary GI, 0.61 (95% CI: 0.50, 0.71) for dietary GL, and 0.61 (95% CI: 0.50, 0.71) for carbohydrate. The correlations between the FFQs and diet records were 0.62 (95% CI: 0.45, 0.74) for dietary GI, 0.77 (95% CI: 0.56, 0.88) for dietary GL, and 0.76 (95% CI: 0.55, 0.88) for carbohydrate after adjustment for within-person variation in the FFQs and diet records.

CONCLUSION

In this sample of men, an FFQ measured dietary GI, dietary GL, and carbohydrate with reproducibility and validity similar to other commonly studied nutritional factors.

Authors+Show Affiliations

Cardiovascular Epidemiology Research Unit, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA. elevitan@bidmc.harvard.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17284756

Citation

Levitan, Emily B., et al. "Reproducibility and Validity of Dietary Glycemic Index, Dietary Glycemic Load, and Total Carbohydrate Intake in 141 Swedish Men." The American Journal of Clinical Nutrition, vol. 85, no. 2, 2007, pp. 548-53.
Levitan EB, Westgren CW, Liu S, et al. Reproducibility and validity of dietary glycemic index, dietary glycemic load, and total carbohydrate intake in 141 Swedish men. Am J Clin Nutr. 2007;85(2):548-53.
Levitan, E. B., Westgren, C. W., Liu, S., & Wolk, A. (2007). Reproducibility and validity of dietary glycemic index, dietary glycemic load, and total carbohydrate intake in 141 Swedish men. The American Journal of Clinical Nutrition, 85(2), pp. 548-53.
Levitan EB, et al. Reproducibility and Validity of Dietary Glycemic Index, Dietary Glycemic Load, and Total Carbohydrate Intake in 141 Swedish Men. Am J Clin Nutr. 2007;85(2):548-53. PubMed PMID: 17284756.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reproducibility and validity of dietary glycemic index, dietary glycemic load, and total carbohydrate intake in 141 Swedish men. AU - Levitan,Emily B, AU - Westgren,Camilla W, AU - Liu,Simin, AU - Wolk,Alicja, PY - 2007/2/8/pubmed PY - 2007/3/14/medline PY - 2007/2/8/entrez SP - 548 EP - 53 JF - The American journal of clinical nutrition JO - Am. J. Clin. Nutr. VL - 85 IS - 2 N2 - BACKGROUND: Although the associations of dietary glycemic index (GI) and dietary glycemic load (GL) with many chronic diseases have been examined in epidemiologic studies, information regarding the reproducibility and validity of these measures assessed with the use of food-frequency questionnaires (FFQs) is lacking. OBJECTIVE: We examined the reproducibility and validity of dietary GI and dietary GL and of carbohydrate intake as assessed by using an FFQ. DESIGN: Swedish men (n = 141) aged 40-74 y completed 2 FFQs 1 y apart and two 1-wk weighed diet records 6 mo apart. Dietary GI, dietary GL, and carbohydrate intake (starches and sugars) were calculated from both FFQs and diet records. We used intraclass correlations between the 2 FFQs to measure reproducibility and Pearson correlations between the diet records and the FFQs to assess the relative validity. RESULTS: Reproducibility of the FFQs was 0.66 (95% CI: 0.56, 0.75) for dietary GI, 0.61 (95% CI: 0.50, 0.71) for dietary GL, and 0.61 (95% CI: 0.50, 0.71) for carbohydrate. The correlations between the FFQs and diet records were 0.62 (95% CI: 0.45, 0.74) for dietary GI, 0.77 (95% CI: 0.56, 0.88) for dietary GL, and 0.76 (95% CI: 0.55, 0.88) for carbohydrate after adjustment for within-person variation in the FFQs and diet records. CONCLUSION: In this sample of men, an FFQ measured dietary GI, dietary GL, and carbohydrate with reproducibility and validity similar to other commonly studied nutritional factors. SN - 0002-9165 UR - https://www.unboundmedicine.com/medline/citation/17284756/Reproducibility_and_validity_of_dietary_glycemic_index_dietary_glycemic_load_and_total_carbohydrate_intake_in_141_Swedish_men_ L2 - https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/85.2.548 DB - PRIME DP - Unbound Medicine ER -