Is higher 25-hydroxyvitamin D level preventive for respiratory distress syndrome in preterm infants?

Area of Science:

• Neonatology
• Pediatric Pulmonology
• Nutritional Biochemistry

Background:

• Respiratory distress syndrome (RDS) is a significant cause of morbidity and mortality in preterm infants.
• Vitamin D deficiency is prevalent in pregnant women and newborns, and its role in neonatal respiratory health is under investigation.

Purpose of the Study:

• To examine the association between cord blood 25-hydroxyvitamin D (25(OH)D) levels and the incidence of RDS in preterm infants.
• To determine if low vitamin D levels are a risk factor for developing RDS in this population.

Main Methods:

• A prospective study enrolled 81 preterm infants (gestational age < 32 weeks).
• Cord blood samples were analyzed for 25(OH)D levels, categorizing infants into low (≤15 ng/mL) and normal (>15 ng/mL) groups.
• Further subgrouping was done for severe (≤5 ng/mL) and mild (5-15 ng/mL) vitamin D deficiency.

Main Results:

• Infants with low cord blood 25(OH)D levels (n=57) had a significantly higher RDS rate compared to those with normal levels (n=3, 5.4%).
• RDS rates were 32.7% in severe deficiency and 61.8% in mild deficiency groups, versus 5.4% in the normal group (p=0.001).
• Multivariate analysis indicated that higher 25(OH)D levels were protective against RDS development (OR 0.6; p=0.001).

Conclusions:

• Lower cord blood 25(OH)D levels are associated with an increased risk of RDS in preterm infants.
• These findings suggest a potential role for vitamin D in respiratory health of preterm neonates.
• Further research and potential interventions regarding vitamin D supplementation in pregnancy or neonates may be warranted.