Vitamin A for acute respiratory infection in developing countries: a meta-analysis

Area of Science:

• Pediatric Infectious Diseases
• Nutritional Science
• Public Health in Developing Nations

Background:

• Acute lower respiratory tract infections (LRTI) are a leading cause of childhood mortality in developing countries.
• Vitamin A deficiency is common in these regions and impacts immune function.
• High-dose vitamin A is sometimes used as an adjunct therapy for severe infections.

Purpose of the Study:

• To evaluate the efficacy of high-dose vitamin A as an adjunct to standard treatment for acute lower respiratory tract infections (LRTI) in children.
• To assess the impact on recovery measures and mortality in pediatric patients in developing countries.

Main Methods:

• Systematic review and meta-analysis of double-blinded, randomized, controlled trials.
• Included children aged 1 month to 6 years with acute non-measles LRTI.
• Compared outcomes between high-dose vitamin A intervention and placebo groups.

Main Results:

• Five studies with 2177 children (1067 intervention, 1110 control) were included.
• No significant differences were observed in time to fever normalization, respiratory rate, oxygen dependence, or hospital discharge.
• Mortality was low (<2%) in both groups, with a non-significantly higher risk in the vitamin A group (OR 1.16).

Conclusions:

• Current evidence does not support the use of high-dose vitamin A to improve recovery from pneumonia in young children in developing countries.
• Further research may be needed to explore specific subgroups or alternative dosing strategies, but current data show no benefit.