Vitamin A deficiency and factors associated with retinol levels in public school students

Abstract

A B S T R A C T ObjectiveTo estimate the prevalence of vitamin A deficiency and determine the socioeconomic and demographic factors associated with serum retinol levels in public school students. MethodsThis cross-sectional study included 245 students from the urban and rural areas of the city of Teresina, Piauí, Brazil. Socioeconomic data were collected using a form. Serum retinol level was determined by high-performance liquid chromatography and classified according to the cut-off points provided by the World Health Organization. All statistical tests had a significance level of 5%. ResultsThe prevalence of vitamin A deficiency (retinol level <0.70μmol/L) was 9.8% (95%CI=7.9-10.0). The prevalences of low and acceptable retinol levels (<1.05mmol/L) were higher in students aged 12-14 years living in households Revista de NutriçãoRev. Nutri., Campinas, 30(5):605-614, set./out

Effect of HIV status and retinol on immunogenicity to oral cholera vaccine in adult population living in an endemic area of Lukanga Swamps, Zambia

“…While retinol supplementation has been known to reduce the severity and pathogen-induced mortality, also at the same time, retinol deficiency leads to impaired mucosal and systemic immune responses henceforth affecting uptake of orally administered vaccines [ 28 , 29 ]. We analyzed retinol levels before administration of Shanchol™ and the results indicated that all our participants had serum retinol levels above 0.7umol/L, a cut-off for retinol deficiency [ 30 ].…”