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Titre : | Self-Reported Dietary Supplement Use Is Reproducible and Relatively Valid in the Cancer Prevention Study-3 Diet Assessment Substudy (2022) |
Auteurs : | Terryl J. Hartman ; Ying Wang ; Rebecca A. Hodge ; Diane C. Mitchell ; W. Dana Flanders ; Chengchen Li ; Laura Sampson ; Alyssa N. Troeschel ; Alpa V. Patel ; Marjorie L. McCullough |
Type de document : | Article |
Dans : | Journal of the academy of nutrition and dietetics (Vol. 122, n°9, September 2022) |
Article en page(s) : | p. 1665-1676.e2 |
Langues: | Anglais |
Descripteurs : |
HE Vinci Compléments alimentaires |
Mots-clés: | Validity ; Reproducibility ; Food frequency questionnaire |
Résumé : | Background Dietary supplement use is common, particularly among cancer survivors and those at increased risk for cancer. Objective The objectives of this study were to assess 1-year test?retest reproducibility of dietary supplement use reported via food frequency questionnaire (FFQ-1 vs FFQ-2) and relative validity in comparison to repeated 24-hour dietary recalls (FFQ-2 vs DRs). Design This ancillary study was conducted within a large prospective cohort, the American Cancer Society?s Cancer Prevention Study-3. Participants/setting Between 2015 and 2016, 684 participants in the United States (64% women; 62% non-Hispanic White, 23% non-Hispanic Black, and 15% Hispanic) completed two FFQs and up to six unannounced telephone interviewer-administered DRs over 1 year as part of the Cancer Prevention Study-3 Diet Assessment Substudy. Primary outcome measures FFQs queried current multivitamin-mineral supplement (?10 components) use, frequency and dose (range) for seven supplements taken individually or as part of a complex (individual/complex) including calcium, vitamins D, C, and E, folic acid, fish oil, and glucosamine. DRs allowed exact reporting of supplement frequency and dose. Statistical analyses Weighted ? statistics were used to evaluate reproducibility between FFQ-1 and FFQ-2 and Spearman correlation coefficients assessed agreement between supplemental nutrient amounts assessed by FFQ-2 and the average of DRs. Results Just more than half of the participants reported taking multivitamin-mineral supplements on the baseline FFQ. Kappa statistics for the comparison of categorical responses between FFQ-1 and FFQ-2 were 0.67 for multivitamin-mineral supplements. Kappas for individual/complex supplements ranged from 0.47 for folic acid to 0.74 for vitamin D, with a mean of 0.64. Results were similar between men and women. Spearman correlation coefficients comparing FFQ-2 with the average of DRs (validity) for nutrient intakes from all sources ranged from 0.65 (fish oil for women) to 0.77 (vitamin D for men and calcium for women); results were similar among men and women. Conclusions These findings suggest the FFQ used in Cancer Prevention Study-3 has good reproducibility over 1 year and yields estimates comparable to a more detailed assessment for commonly consumed dietary supplements. |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/science/article/pii/S2212267221008327 |