OBJECTIVE: To evaluate the reproducibility and validity of folate intake (FI) estimated from a food frequency questionnaire (FFQ), taking into account the retention factor (RF) associated with meal preparation processes. MATERIAL AND METHODS: A total of 497 healthy adult participants were interviewed with a FFQ. A second interview was performed one year later of a sample of 100 randomly selected individuals who had not modified their diet during the previous year. In addition,serum folate (SF) concentrations were measured by radioimmunoassay to evaluate the validity of FI. RESULTS: Reproducibility of IF was 0.36 and 0.34 for folate without FR and with FR, respectively. SF concentration significantly correlated with FI (0.18 with RF; 0.21 without RF, p<0.05). CONCLUSION: Incorporating the folate RF in estimates of FI does not improve the reproducibility and validity of those estimates.
OBJECTIVE: To evaluate the reproducibility and validity of folate intake (FI) estimated from a food frequency questionnaire (FFQ), taking into account the retention factor (RF) associated with meal preparation processes. MATERIAL AND METHODS: A total of 497 healthy adult participants were interviewed with a FFQ. A second interview was performed one year later of a sample of 100 randomly selected individuals who had not modified their diet during the previous year. In addition,serum folate (SF) concentrations were measured by radioimmunoassay to evaluate the validity of FI. RESULTS: Reproducibility of IF was 0.36 and 0.34 for folate without FR and with FR, respectively. SF concentration significantly correlated with FI (0.18 with RF; 0.21 without RF, p<0.05). CONCLUSION: Incorporating the folate RF in estimates of FI does not improve the reproducibility and validity of those estimates.
Authors: Grant Quiller; Ángel Mérida-Ortega; Stephen J Rothenberg; Mariano E Cebrián; A Jay Gandolfi; Francisco Franco-Marina; Lizbeth López-Carrillo Journal: Nutr Res Date: 2018-04-21 Impact factor: 3.315
Authors: Aurea K Ramírez-Jiménez; Ivan Luzardo-Ocampo; M Liceth Cuellar-Nuñez; Miriam Aracely Anaya-Loyola; Ma Fabiola León-Galván; Guadalupe Loarca-Piña Journal: Front Nutr Date: 2022-06-03
Authors: Lizbeth López-Carrillo; Brenda Gamboa-Loira; Wendy Becerra; César Hernández-Alcaraz; Raúl Ulises Hernández-Ramírez; A Jay Gandolfi; Francisco Franco-Marina; Mariano E Cebrián Journal: Environ Res Date: 2016-08-23 Impact factor: 6.498