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A 51-item calcium-focused food frequency questionnaire is a reliable tool to assess dietary calcium intake in postmenopausal women.
Nutr Res. 2017 Jul; 43:33-42.NR

Abstract

Given the lack in a valid biomarker to assess dietary calcium intake (dCai), reproducible estimation of usual dCai is crucial for better understanding of its interaction with health outcomes in specific populations. This study tested the hypothesis that a calcium-focused food frequency questionnaire (FFQ) may be used to estimate dCai of women ≥50 years residing in a multicultural environment (Montreal, Canada). One hundred and eight women (age, 63.1±7.7 years; 98% postmenopausal) completed the FFQ twice and 4 nonconsecutive 24-hour recalls (24HRs) over 1 month. Medians of dCai were compared by Wilcoxon signed rank test. Reproducibility and relative validity of the FFQ were assessed by Spearman correlation (rs) and Cohen's weighted kappa (κw). Agreement was further assessed by cross-classification by quartiles, Bland-Altman plot, and sensitivity and specificity analyses. The median (interquartile range) dCai estimated by the FFQ and 24HRs were 723 (524-1033) mg/d and 854 (666-1068) mg/d, respectively (P<.001). The FFQs had a strong correlation (rs=0.72, P<.001) and moderate agreement (κw=0.55). The FFQ and 24HRs were moderately correlated (rs=0.65, P<.001). Cross-classification showed moderate agreement (κw=0.42), with 85% of the participants classified into identical or contiguous quartiles and 2.8% into extreme opposite quartiles. According to the Bland-Altman plot, the FFQ underestimated dCai with a bias of 99 mg/d (95% limits of agreement, -677 to +480 mg/d). Sensitivity and specificity of identifying intakes <1000 mg/d were 90% and 57%, respectively. This FFQ is a useful tool to discriminate dCai <600 and ≥1000 mg/d in postmenopausal women and to rank dCai in epidemiological studies.

Authors+Show Affiliations

Division of General Internal Medicine, Research Institute of McGill University Health Centre, Montreal, Québec, Canada H3G 1A4; School of Dietetics and Human Nutrition, McGill University, Ste. Anne de Bellevue, Québec, Canada H9X 3V9. Electronic address: angel.ong@mail.mcgill.ca.School of Dietetics and Human Nutrition, McGill University, Ste. Anne de Bellevue, Québec, Canada H9X 3V9. Electronic address: hope.weiler@mcgill.ca.Division of General Internal Medicine, Research Institute of McGill University Health Centre, Montreal, Québec, Canada H3G 1A4. Electronic address: michelle.wall@mail.mcgill.ca.Department of Medicine, McGill University, Montreal, Québec, Canada H3G 1Y6; Division of Endocrinology and Metabolism, Research Institute of the McGill University Health Centre, Montreal, Québec, Canada H4A 3J1. Electronic address: david.goltzman@mcgill.ca.College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 2Z4. Electronic address: sjw084@mail.usask.ca.Division of General Internal Medicine, Research Institute of McGill University Health Centre, Montreal, Québec, Canada H3G 1A4; Department of Medicine, McGill University, Montreal, Québec, Canada H3G 1Y6. Electronic address: stella.daskalopoulou@mcgill.ca.Division of General Internal Medicine, Research Institute of McGill University Health Centre, Montreal, Québec, Canada H3G 1A4; Department of Medicine, McGill University, Montreal, Québec, Canada H3G 1Y6. Electronic address: suzanne.morin@mcgill.ca.

Pub Type(s)

Journal Article
Validation Study

Language

eng

PubMed ID

28739052

Citation

Ong, Angel M., et al. "A 51-item Calcium-focused Food Frequency Questionnaire Is a Reliable Tool to Assess Dietary Calcium Intake in Postmenopausal Women." Nutrition Research (New York, N.Y.), vol. 43, 2017, pp. 33-42.
Ong AM, Weiler HA, Wall M, et al. A 51-item calcium-focused food frequency questionnaire is a reliable tool to assess dietary calcium intake in postmenopausal women. Nutr Res. 2017;43:33-42.
Ong, A. M., Weiler, H. A., Wall, M., Goltzman, D., Whiting, S. J., Daskalopoulou, S. S., & Morin, S. N. (2017). A 51-item calcium-focused food frequency questionnaire is a reliable tool to assess dietary calcium intake in postmenopausal women. Nutrition Research (New York, N.Y.), 43, 33-42. https://doi.org/10.1016/j.nutres.2017.05.006
Ong AM, et al. A 51-item Calcium-focused Food Frequency Questionnaire Is a Reliable Tool to Assess Dietary Calcium Intake in Postmenopausal Women. Nutr Res. 2017;43:33-42. PubMed PMID: 28739052.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A 51-item calcium-focused food frequency questionnaire is a reliable tool to assess dietary calcium intake in postmenopausal women. AU - Ong,Angel M, AU - Weiler,Hope A, AU - Wall,Michelle, AU - Goltzman,David, AU - Whiting,Susan J, AU - Daskalopoulou,Stella S, AU - Morin,Suzanne N, Y1 - 2017/05/18/ PY - 2017/02/25/received PY - 2017/04/26/revised PY - 2017/05/11/accepted PY - 2017/7/26/entrez PY - 2017/7/26/pubmed PY - 2018/5/8/medline KW - Dietary calcium intake KW - Food frequency questionnaire KW - Middle-aged women KW - Nutrition assessment KW - Relative validity SP - 33 EP - 42 JF - Nutrition research (New York, N.Y.) JO - Nutr Res VL - 43 N2 - Given the lack in a valid biomarker to assess dietary calcium intake (dCai), reproducible estimation of usual dCai is crucial for better understanding of its interaction with health outcomes in specific populations. This study tested the hypothesis that a calcium-focused food frequency questionnaire (FFQ) may be used to estimate dCai of women ≥50 years residing in a multicultural environment (Montreal, Canada). One hundred and eight women (age, 63.1±7.7 years; 98% postmenopausal) completed the FFQ twice and 4 nonconsecutive 24-hour recalls (24HRs) over 1 month. Medians of dCai were compared by Wilcoxon signed rank test. Reproducibility and relative validity of the FFQ were assessed by Spearman correlation (rs) and Cohen's weighted kappa (κw). Agreement was further assessed by cross-classification by quartiles, Bland-Altman plot, and sensitivity and specificity analyses. The median (interquartile range) dCai estimated by the FFQ and 24HRs were 723 (524-1033) mg/d and 854 (666-1068) mg/d, respectively (P<.001). The FFQs had a strong correlation (rs=0.72, P<.001) and moderate agreement (κw=0.55). The FFQ and 24HRs were moderately correlated (rs=0.65, P<.001). Cross-classification showed moderate agreement (κw=0.42), with 85% of the participants classified into identical or contiguous quartiles and 2.8% into extreme opposite quartiles. According to the Bland-Altman plot, the FFQ underestimated dCai with a bias of 99 mg/d (95% limits of agreement, -677 to +480 mg/d). Sensitivity and specificity of identifying intakes <1000 mg/d were 90% and 57%, respectively. This FFQ is a useful tool to discriminate dCai <600 and ≥1000 mg/d in postmenopausal women and to rank dCai in epidemiological studies. SN - 1879-0739 UR - https://www.unboundmedicine.com/medline/citation/28739052/A_51_item_calcium_focused_food_frequency_questionnaire_is_a_reliable_tool_to_assess_dietary_calcium_intake_in_postmenopausal_women_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0271-5317(17)30158-6 DB - PRIME DP - Unbound Medicine ER -