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Serum Vitamin D Profiles of Children with Asthma in Southwest Saudi: A Comparative Cross-Sectional Study
1Department of Child Health, King Khalid University, Abha, 62529, Saudi Arabia.
Insights
Vitamin D deficiency is highly prevalent in asthmatic children in Saudi Arabia, with over half showing deficiency. Older age and higher BMI predict lower vitamin D levels in these children.
Area of Science:
- Pediatric Allergy and Immunology
- Nutritional Biochemistry
- Public Health
Background:
- Vitamin D deficiency is linked to increased asthma prevalence and severity.
- Asthma management requires understanding contributing factors like nutritional status.
- Investigating vitamin D's role in pediatric asthma is crucial for public health.
Purpose of the Study:
- To determine the prevalence of vitamin D deficiency in asthmatic children.
- To assess the relationship between vitamin D status and asthma control/severity.
- To identify predictors of vitamin D deficiency in pediatric asthma patients.
Main Methods:
- A comparative cross-sectional study was conducted at a tertiary care hospital.
- Serum vitamin D levels were measured in 331 asthmatic and 101 non-asthmatic children.
- Statistical analyses included correlation and regression to identify predictors.
Main Results:
- Asthmatic children had significantly lower vitamin D levels (21.5 ng/mL) than controls (33.3 ng/mL).
- Vitamin D deficiency (51.1%) and insufficiency (34.7%) were significantly higher in asthmatic children.
- Older age and higher BMI were independent predictors of lower vitamin D levels in asthmatic children.
Conclusions:
- A high prevalence of vitamin D deficiency exists among asthmatic children in southwestern Saudi Arabia.
- Vitamin D screening and supplementation are recommended for this population.
- Targeted interventions for older, overweight asthmatic children may be beneficial.
Background:
Evidence suggests a strong association between vitamin D status and asthma, with individuals exhibiting vitamin D deficiency demonstrating increased prevalence and severity of asthma symptoms. This study aimed to determine the prevalence of vitamin D deficiency among asthmatic children, assess the association between vitamin D status and asthma severity/control, and identify potential predictors of vitamin D deficiency in this population.
Patients And Methods:
This comparative cross-sectional, hospital-based study was conducted at Abha Maternity and Children's Hospital, a tertiary care and teaching institution in southwestern Saudi Arabia, between January 2023 and May 2024.
Results:
A total of 331 asthmatic children and 101 non-asthmatic children were analyzed. Children with asthma had significantly lower serum vitamin D levels than those without asthma (21.5 ± 8.8 ng/mL vs 33.3 ± 13.2 ng/mL, p < 0.001). Significantly higher proportions of asthmatic children exhibited vitamin D deficiency (51.1%) and insufficiency (34.7%) compared to non-asthmatic children (19.8% and 29.7%, respectively). Serum vitamin D levels among asthmatic children showed significant negative correlations with age (r = -0.332, p < 0.001), weight (r = -0.292, p < 0.001), height (r = -0.298, p < 0.001), and BMI (r = -0.274, p < 0.001). These findings were further supported by univariate linear regression analysis. Multivariable analysis additionally confirmed age (β = -0.66, p < 0.001) and BMI (β = -0.25, p = 0.05) as independent predictors of vitamin D status, with older age and higher BMI associated with lower vitamin D levels. For each additional year of age, serum vitamin D decreased by an average of 0.66 ng/mL (p < 0.001) and a one-unit increase in BMI was associated with a decrease of 0.25 ng/mL in serum vitamin D (p = 0.05).
Conclusion:
This study found a strikingly high prevalence of vitamin D deficiency among asthmatic children in southwestern Saudi Arabia, significantly exceeding rates in controls. These findings underscore the need for widespread vitamin D screening and supplementation in this population, particularly among older, overweight asthmatic children.
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