A recent study from Sidra Medicine highlights the high prevalence of vitamin D deficiency among children in Qatar, especially those with excess weight, prompting calls for targeted screening and prevention strategies.
Vitamin D deficiency is widespread among children in Qatar and appears especially common in those with excess weight, regardless of whether they have asthma, according to a new cross-sectional study from Sidra Medicine in Doha. The research found that low vitamin D levels were present in most children across all study groups, with overweight or obese children showing the lowest concentrations overall. That result adds to a broader body of evidence showing that childhood asthma remains a major global health burden and that vitamin D deficiency is frequently seen in children with asthma.
The study reviewed 364 children aged 6 to 17 from the Middle East and North Africa region living in Qatar, dividing them into four groups: normal weight with asthma, overweight or obese with asthma, overweight or obese without asthma and normal weight without asthma. Asthma was diagnosed by physicians using Global Initiative for Asthma guidance, while vitamin D status was based on serum 25-hydroxyvitamin D levels. The authors said deficiency was defined as below 50 nmol/L, insufficiency as 50 to 74 nmol/L and sufficiency as 75 nmol/L or higher.
The most notable pattern was the relationship between body mass index and vitamin D in children with overweight or obesity. In both overweight groups, higher BMI was linked to lower vitamin D levels, while no meaningful relationship appeared in the normal-weight groups. By contrast, asthma status alone was not independently associated with vitamin D status. The authors said the interaction between asthma and overweight or obesity was not statistically significant, suggesting no evidence that the two conditions together had a combined effect on vitamin D beyond the impact of excess weight itself.
Vitamin D deficiency was common in every group, ranging from about two-thirds of children to more than four-fifths in the overweight or obese group without asthma. Sufficiency was rare. The findings fit with previous research showing that vitamin D deficiency is common among children with asthma and that excess body fat can lower circulating vitamin D through sequestration in adipose tissue, dilution across a larger body mass and altered metabolism. The World Health Organization also notes that childhood asthma is an important global health concern, while studies from Asia and Africa have reported high rates of vitamin D deficiency in children with asthma.
The authors cautioned that the study could not prove cause and effect because it was cross-sectional and lacked data on sun exposure, diet, supplementation, physical activity and season of blood sampling. They also noted possible selection bias because participants were recruited from clinic settings rather than the general population. Even so, they said the very high background rate of deficiency makes vitamin D a public-health concern in this population and supports consideration of screening and targeted prevention efforts, especially for children with overweight or obesity.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
