title: Validation of a Web-based, self-administered, non-consecutive-day dietary record tool against urinary biomarkers.
abstract: New technologies are promising for the use of short-term instruments for dietary data collection; however, innovative tools should be validated against objective biomarkers. The aim of the present study was to investigate the validity of a Web-based, self-administered dietary record (DR) tool using protein, K and Na intakes against 24 h urinary biomarkers (24 h U). Of the total participants, 199 adult volunteers (104 men and 95 women, mean age 50·5 (23-83 years)) of the NutriNet-Santé Study were included in the protocol. They completed three non-consecutive-day DR and two 24 h U on the first and third DR days. Relative differences between reported (DR) and measured (24 h U) intakes were calculated from the log ratio (DR/24 h U) for protein, K and Na intakes: -14·4,+2·6 and -2·1 % for men; and -13·9, -3·7 and -8·3 % for women, respectively. The correlations between reported and true intakes were 0·61, 0·78 and 0·47 for men and 0·64, 0·42 and 0·37 for women for protein, K and Na, respectively. Attenuation factors, that represent attenuation of the true diet-disease relationship due to measurement error (a value closer to 1 indicating lower attenuation), ranged from 0·23 (Na, women) to 0·60 (K, men). We showed that the Web-based DR tool used in the NutriNet-Santé cohort study performs well in estimating protein and K intakes and fairly well in estimating Na intake. Furthermore, three non-consecutive-day DR appear to be valid for estimating usual intakes of protein and K, although caution is advised regarding the generalisability of these findings to other nutrients and general population.
authors.affiliation: Nutritional Epidemiology Research Team, Research Center in Epidemiology and Biostatistics,Sorbonne Paris Cité, Inserm U1153, SMBH, 74 rue Marcel Cachin,BobignyF-93017,France.
authors.forename: Camille
authors.initials: C
authors.lastname: Lassale
authors.affiliation: Nutrition Surveillance and Epidemiology Unit,University Paris 13, Sorbonne Paris Cité,Bobigny,France.
authors.forename: Katia
authors.initials: K
authors.lastname: Castetbon
authors.affiliation: Department of Biochemistry,University Hospital of Grenoble,Grenoble,France.
authors.forename: François
authors.initials: F
authors.lastname: Laporte
authors.affiliation: Nutritional Epidemiology Research Team, Research Center in Epidemiology and Biostatistics,Sorbonne Paris Cité, Inserm U1153, SMBH, 74 rue Marcel Cachin,BobignyF-93017,France.
authors.forename: Géraldine M
authors.initials: GM
authors.lastname: Camilleri
authors.affiliation: Nutrition Surveillance and Epidemiology Unit,University Paris 13, Sorbonne Paris Cité,Bobigny,France.
authors.forename: Valérie
authors.initials: V
authors.lastname: Deschamps
authors.affiliation: Nutrition Surveillance and Epidemiology Unit,University Paris 13, Sorbonne Paris Cité,Bobigny,France.
authors.forename: Michel
authors.initials: M
authors.lastname: Vernay
authors.affiliation: Department of Biochemistry,University Hospital of Grenoble,Grenoble,France.
authors.forename: Patrice
authors.initials: P
authors.lastname: Faure
authors.affiliation: Nutritional Epidemiology Research Team, Research Center in Epidemiology and Biostatistics,Sorbonne Paris Cité, Inserm U1153, SMBH, 74 rue Marcel Cachin,BobignyF-93017,France.
authors.forename: Serge
authors.initials: S
authors.lastname: Hercberg
authors.affiliation: Nutritional Epidemiology Research Team, Research Center in Epidemiology and Biostatistics,Sorbonne Paris Cité, Inserm U1153, SMBH, 74 rue Marcel Cachin,BobignyF-93017,France.
authors.forename: Pilar
authors.initials: P
authors.lastname: Galan
authors.affiliation: Nutritional Epidemiology Research Team, Research Center in Epidemiology and Biostatistics,Sorbonne Paris Cité, Inserm U1153, SMBH, 74 rue Marcel Cachin,BobignyF-93017,France.
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Kesse-Guyot
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000652:urine; D015331:Cohort Studies; D004032:Diet / Q000009:adverse effects; D015930:Diet Records; D004044:Dietary Proteins / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D009584:Nitrogen / Q000652:urine; D015596:Nutrition Assessment; D010297:Paris; D011188:Potassium / Q000652:urine; D017419:Potassium, Dietary / Q000008:administration & dosage*; D057566:Self Report; D012964:Sodium / Q000652:urine; D012982:Sodium, Dietary / Q000008:administration & dosage*; D055815:Young Adult
chemical_list: D015415:Biomarkers; D004044:Dietary Proteins; D017419:Potassium, Dietary; D012982:Sodium, Dietary; D012964:Sodium; D009584:Nitrogen; D011188:Potassium
keywords: Urinary biomarkers