Proxy Markers of Serum Retinol Concentration, Used Alone and in Combination, to Assess Population Vitamin A Status in Kenyan Children.
Article
Dans Anglais
| IMSEAR
| ID: sea-164884
ABSTRACT
Objectives:
To assess the diagnostic performance of serum concentrations of retinol-binding protein (RBP), transthyretin, retinol concentration measured by fluorometry and RBPtransthyretin molar ratio, either alone or in combination, to estimate the prevalence of vitamin A deficiency (serum retinol concentration <0.70 μmol/L measured by high-performance liquid chromatography(HPLC)).Methods:
A cross-sectional study was conducted in 15 primary schools in Kibwezi and Makindu districts in Eastern province, Kenya in June 2010 with 375 schoolchildren (6-12 years), 25 randomly selected from each school by lot quality assurance sampling.Results:
Complete data were collected for 372 children. Mean serum concentration of retinol (HPLC), RBP and transthyretin were 0.87 (SD 0.19) µmol/L, 0.67 (SD 0.17) µmol/L and 3.0 (SD 0.62) µmol/L. The mean RBP Transthyretin molar ratio was 0.23. The prevalence of vitamin A deficiency measured with HPLC was 18%. Transthyretin and RBP showed the largest area under the curve (AUCs 0.96 and 0.93, respectively). Logistic regression resulted in a model predicting vitamin A deficiency based on RBP, transthyretin and C-reactive protein (AUC 0.98) and prevalence depending cutpoints for the linear predictor were calculated.Conclusions:
Combination of transthyretin, RBP and C-reactive protein in a linear predictor showed excellent diagnostic performance in assessing vitamin A status, and has great potential to eventually replace serum retinol concentration measured by HPLC as the preferred method to assess the population burden of vitamin A deficiency. Further research is needed to confirm whether this linear predictor yields similar results in different populations and laboratories. Our methodology can be widely applied for other diagnostic aims.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Type d'étude:
Étude observationnelle
/
Étude pronostique
/
Facteurs de risque
langue:
Anglais
Année:
2015
Type:
Article
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS