A combination of statistical methods for the analysis of the relative validation data of the quantitative food frequency questionnaire used in the THUSA study. Transition, Health and Urbanisation in South Africa

Public Health Nutrition
U E MacIntyreH S Steyn

Abstract

To apply structural equation modelling (SEM) and estimation of variance components to the relative validation data obtained from the quantitative food frequency questionnaire (QFFQ) used in the Transition, Health and Urbanisation in South Africa (THUSA) study. A cross-sectional study. A community-based field study in an African population conducted during 1996. Residents of the North West Province, South Africa, aged between 15 and 65 years. Relative validity of the QFFQ was tested against 7-day weighed food records, 24-hour urinary nitrogen (UN) excretion and estimated basal metabolic rate (BMR). SEM and estimation of variance components were applied to the log-transformed energy, protein, fat, calcium, iron, vitamin A and vitamin C intakes. UN excretion was used as a biomarker in the application of the SEM to protein and estimated BMR to energy intakes. Constant bias (alphaQ) derived by the SEM varied from 0.85 (vitamin C) to 5.8 (energy). There was significant proportional bias for all nutrients except vitamin C. Validation coefficients (ro(Q,T) varied from 0.3 (fat, calcium, iron) to 0.7 (vitamin C). The inclusion of estimated BMR in the SEM for energy increased ro(Q, T) from 0.38 to 0.42. The estimation of variance compone...Continue Reading

References

Jul 1, 1991·The British Journal of Nutrition·M G O'DonnellD M Walker
Jan 1, 1985·Kidney International·B J MaroniW E Mitch
Sep 1, 1995·The British Journal of Nutrition·M PorriniF Fidanza
Jan 1, 1995·International Journal of Epidemiology·J M Bland, D G Altman
Oct 1, 1993·International Journal of Epidemiology·R L Thompson, B M Margetts
Oct 1, 1994·Toxicology in Vitro : an International Journal Published in Association with BIBRA·K L WhiteJ H Dean
Nov 1, 1989·Environmental Monitoring and Assessment·S R Esterby

❮ Previous
Next ❯

Citations

Mar 13, 2014·Journal of the Academy of Nutrition and Dietetics·Friedeburg Anna Maria WenholdPaul Rheeder
Jul 12, 2017·Environmental Health Perspectives·Fraser W GasparBrenda Eskenazi
Jan 11, 2018·International Journal of Environmental Research and Public Health·Pieter H MyburghCornelie Nienaber-Rousseau
Apr 13, 2018·Environmental Health Perspectives·Brenda EskenaziJonathan Chevrier
Feb 2, 2019·The British Journal of Nutrition·Inarie JacobsIsabelle Romieu
Apr 17, 2018·Public Health Nutrition·Rachel M ZackGoodarz Danaei
May 14, 2009·Psychotherapy Research : Journal of the Society for Psychotherapy Research·Bo Heffler, Rolf Sandell
Jul 26, 2018·BMC Pregnancy and Childbirth·Elizabeth A SymingtonCornelius M Smuts
Dec 23, 2004·Blood Coagulation & Fibrinolysis : an International Journal in Haemostasis and Thrombosis·Deirdré LootsHester H Vorster
Feb 15, 2012·Advances in Nutrition·Chrystalleni Lazarou, P K Newby
May 18, 2011·Ciência & saúde coletiva·Silvia Maria VociMaria do Rosário Dias de Oliveira Latorre
Feb 18, 2015·Blood Coagulation & Fibrinolysis : an International Journal in Haemostasis and Thrombosis·Cornelie Nienaber-RousseauMarlien Pieters
Jan 15, 2015·The British Journal of Nutrition·Lindsay OrcholskiDale A Schoeller
Sep 17, 2020·International Journal of Environmental Research and Public Health·Pieter Hermanus MyburghGordon Wayne Towers
Apr 18, 2019·Environmental Science & Technology·Stephen RauchBrenda Eskenazi

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.