Risk factors for early infant mortality in Sarlahi district, Nepal
Joanne Katz1, Keith P West, Subarna K Khatry
1Division of Disease Prevention and Control, Center for Human Nutrition, Sight & Life Research Institute, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA. jkatz@jhsph.edu
Insights
Identifying early infant mortality risk factors is crucial for intervention. Maternal factors like education and arm circumference, alongside prior pregnancy history, significantly impact infant survival rates.
Area of Science:
- Global Health
- Maternal and Child Health
- Demography
Background:
- Early infant mortality rates remain a significant public health challenge in many regions.
- Declining child mortality has not been matched by similar declines in early infant mortality, necessitating targeted research.
Purpose of the Study:
- To identify specific risk factors associated with early infant mortality.
- To inform the development of effective intervention strategies to reduce infant deaths.
Main Methods:
- A longitudinal study followed 15,469 live-born singleton infants in rural Nepal from birth to 24 weeks of age (1994-1997).
- Mortality risk was analyzed for three distinct periods: 0-7 days, 8-28 days, and 4-24 weeks post-birth.
Main Results:
- Maternal and paternal education were linked to reduced mortality between 4-24 weeks.
- Previous miscarriage predicted first-week mortality, while prior child deaths increased post-neonatal mortality risk.
- Larger maternal mid-upper arm circumference reduced first-week mortality; maternal tetanus vaccination and third-trimester illness were associated with neonatal mortality. Maternal mortality strongly predicted infant mortality across all periods.
Conclusions:
- Risk factors for early infant mortality are age-dependent.
- Intervention strategies should focus on improving maternal health, reducing maternal morbidity and mortality, and increasing maternal mid-upper arm circumference during pregnancy.
Objectives:
Early infant mortality has not declined as rapidly as child mortality in many countries. Identification of risk factors for early infant mortality may help inform the design of intervention strategies.
Methods:
Over the period 1994-97, 15,469 live-born, singleton infants in rural Nepal were followed to 24 weeks of age to identify risk factors for mortality within 0-7 days, 8-28 days, and 4-24 weeks after the birth.
Findings:
In multivariate models, maternal and paternal education reduced mortality between 4 and 24 weeks only: odds ratios (OR) 0.28 (95% confidence interval (CI) = 0.12-0.66) and 0.63 (95% CI = 0.44-0.88), respectively. Miscarriage in the previous pregnancy predicted mortality in the first week of life (OR = 1.98, 95% CI = 1.37-2.87), whereas prior child deaths increased the risk of post-neonatal death (OR = 1.85, 95% CI 1.24-2.75). A larger maternal mid-upper arm circumference reduced the risk of infant death during the first week of life (OR = 0.88, 95% CI = 0.81-0.95). Infants of women who did not receive any tetanus vaccinations during pregnancy or who had severe illness during the third trimester were more likely to die in the neonatal period. Maternal mortality was strongly associated with infant mortality (OR = 6.43, 95% CI = 2.35-17.56 at 0-7 days; OR = 11.73, 95% CI = 3.82-36.00 at 8-28 days; and OR = 51.68, 95% CI = 20.26-131.80 at 4-24 weeks).
Conclusion:
Risk factors for early infant mortality varied with the age of the infant. Factors amenable to intervention included efforts aimed at maternal morbidity and mortality and increased arm circumference during pregnancy.
Related Concept Videos
Development of the Oral Microbiota
Development of Human Microbiota

