Malaria, malnutrition, and birthweight: A meta-analysis using individual participant data

Area of Science:

• Maternal Health
• Infectious Diseases
• Nutritional Science

Background:

• Pregnancy malaria infection is linked to low birthweight (LBW).
• Maternal nutritional status may modify this risk.
• Previous studies indicated a potential interaction, necessitating further investigation.

Purpose of the Study:

• To investigate the combined effect of malaria infection and maternal nutritional status on LBW risk.
• To evaluate the interaction between malaria and anthropometric indicators on LBW.
• To pool data from diverse populations for robust analysis.

Main Methods:

• Pooled analysis of 14,633 pregnancies from 13 studies (Africa and Western Pacific, 1996-2015).
• Used inverse probability of treatment-weighted regression models.
• Assessed interaction using mid-upper arm circumference (MUAC) and body mass index (BMI).

Main Results:

• Malaria infection increased LBW risk (enrollment aRR 1.14, delivery aRR 1.32).
• Low MUAC (<23 cm) significantly increased LBW risk (aRR 1.60).
• Combined malaria and low MUAC yielded a joint aRR of 2.13, but no statistical synergism was observed.

Conclusions:

• Pregnant women with both malaria and malnutrition have a substantially higher risk of LBW.
• Malaria infection and malnutrition do not act synergistically to increase LBW risk.
• Findings highlight the importance of addressing both malaria and malnutrition in pregnancy.