© 1995 Oxford University Press
research-article |
The Effect of Human Immunodeficiency Virus Infection on Birthweight, and Infant and Child Mortality in Urban Malawi
* Department of Epidemiology, Johns Hopkins University School of Hygiene and Public Health Baltimore, MD, USA.
** College of Medicine, University of Malawi Blantyre, Malawi.
National AIDS Control Programme, Ministry of Health Lilongwe, Malawi.
Reprint requests to: Dr Paolo G Miotti, Johns Hopkins University, Department of Epidemiology, 624 North Wolfe Street, Room 893, Baltimore, MD 21205, USA.
BACKGROUND: Low birthweight, prematurity and Intra-uterine growth retardation (IUGR) are major determinants of child survival. Therefore, it is important to assess excess mortality due to human immunodeficiency virus (HIV) infection in populations where low birthweight is common.
METHODS: A prospective study was conducted on 1385 children born to seropositive and seronegative women in urban Malawi. Children were regularly examined and tested for HIV.
RESULTS: The mortality rate of children of HIV seropositive mothers was substantially higher (223/1000 at 12 months, 317/1000 at 24 months and 360/1000 at 30 months) than that of children of seronegative mothers (68/1000 at 12 months, 106/1000 at 24 months and 118/1000 at 30 months). The Incidence of prematurity and IUGR was also higher in infants of HIV seropositive mothers than in infants of seronegative mothers (12.7% versus 3.8%, P < 0.001 for premature and 7.7% versus 4.4%, P= 0.02 for IUGR infants). The mother-to-infant HIV-1 transmission rate was 35.1%. After 12 months of age, HIV infected children showed the highest mortality; however, unInfected children of HIV seropositive and children of HIV seronegative mothers had similar mortality. The mean birthweight of HIV infected and uninfected children was not significantly different. In HIV infected children the most frequent causes of death were diarrhoea, pneumonia and failure to thrive. Less common risk factors for child mortality included active maternal syphilis and cervicitis/vaginitis.
CONCLUSIONS: The substantlal difference in survival among children of HIV infected and uninfected mothers suggests that mortality could be reduced if HIV infection were not a risk factor. To decrease childhood mortality, a combination of interventions such as treatment of sexually transmitted infections during pregnancy and measures to reduce mother-to-infant transmission should be adopted.
Keywords Africa, birthweight, child survival, HIV-1, infant mortality, prematurity
Revised 1 February 1995
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