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Type Journal Article - African Journal of Food, Agriculture, Nutrition and Development
Title Prevalence and predictors of vitamin a deficiency among infants in western Kenya using a cross-sectional analysis
Volume 16
Issue 1
Publication (Day/Month/Year) 2016
Page numbers 10765-10786
URL https://www.ajol.info/index.php/ajfand/article/view/132241
Vitamin A (VA) deficiency (VAD) is a major nutritional public health problem among children
under-5-years-old in the developing world including Kenya. A community-based crosssectional
survey among 1,630 children (aged 6-23 mos) was undertaken in Western Kenya. A
questionnaire was administered to collect demographic, socio-economic and dietary intake
information. Prevalence of low retinol-binding protein (RBP) concentrations was assessed
using Dried Blood Spot (DBS) methodology. Analysis of RBP was carried out using rapid
enzyme immunoassay (EIA) and C-reactive protein (CRP) was carried out using enzyme linked
immunosorbent assay (ELISA) to estimate VA and sub-clinical inflammation statuses,
respectively. Values were adjusted for influence of inflammation using CRP (CRP >5 mg/L)
and population prevalence of VAD (RBP <0.825 µmol/L, biologically equivalent to 0.70
µmol/L retinol) estimated. Anthropometric data gave three indices: stunting, wasting and
underweight—all of which took age and sex into consideration. Mean (geometric± SD)
concentration of RBP was adequate (1.56±0.79µmol/L) but the inflammation-adjusted mean
(±SE) prevalence of VAD was high (20.1±1.1%) in this population. The level of CRP was
within normal range (1.06±4.95 mg/L) whilst 18.4±0.9% of the children had subclinical
inflammation (CRP>5 mg/L). Intake of VA capsule (VAC) by a child was a predictor of VAD
with children who have not taken VA during the past 1 year prior to the survey having a 30%
increased risk of VAD (OR (CI): 1.3 (1.1-1.7); p=0.025. Additionally, age of the child was a
predictor with older children (18-23 mos) having a 30 % increased risk of VAD (OR (CI): 1.3
(1.1-1.9); p=0.035); the caretaker’s knowledge on VA and nutrition was also a predictor of
VAD with children whose caretaker’s had poor knowledge having a 40 % increased risk of
VAD (OR (CI): 1.4 (1.0-1.9); p=0.027. A child’s district of residence was also a significant
predictor of VAD. Prevalence of VAD in this sample of infants was high. Predictors of VAD
included child intake of VAC in the last 1 year before the survey, older children, children
whose caretakers had poor VA and nutritional knowledge and a child’s district of residence.
There is a need to improve knowledge on nutrition and VA of caretakers; undertake a targeted
VAC distribution, particularly in children older than 1 year and above and use a sustainable
food-based intervention in the areas with severe VAD.

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