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Risk factors for diarrheal disease incidence in early childhood: a community cohort study from Guinea-Bissau
K Mølbak1, H Jensen, L Ingholt
1Department of Epidemiology Research, Danish Epidemiology Science Center, Statens Serum Institut, Copenhagen, Denmark.
Insights
Diarrhea risk factors in children include prior illness, male sex, and weaning. Improving water, hygiene, and food handling are key interventions, especially for weaned children.
Area of Science:
- Pediatrics
- Public Health
- Infectious Disease Epidemiology
Background:
- Diarrheal diseases remain a leading cause of child mortality globally.
- Identifying specific risk factors is crucial for targeted prevention strategies.
- Understanding local contexts, like Guinea-Bissau, informs effective public health interventions.
Purpose of the Study:
- To identify independent risk factors associated with increased diarrhea incidence in young children.
- To explore how breastfeeding status modifies the relationship between risk factors and diarrhea.
- To determine key determinants of persistent diarrhea.
Main Methods:
- An open cohort study followed 1,314 children in Guinea-Bissau from 1987 to 1990.
- Weekly diarrhea recall interviews were conducted.
- Data on feeding practices, measles, and 57 explanatory variables were collected for subsets of the cohort.
Main Results:
- Seven variables independently increased diarrhea risk: recent diarrhea, male sex, weaning, lack of maternal care, young household head, cold leftovers, and unprotected water sources.
- Breastfeeding modified effects; risk factors differed significantly between breastfed and weaned children.
- Persistent diarrhea determinants included weaning, lack of maternal education, and household pigs.
Conclusions:
- Promoting breastfeeding is important, but interventions targeting water supply, hygiene, and food handling are critical, particularly for weaned children.
- Effect modification by breastfeeding highlights the need for tailored public health strategies.
- Environmental and socioeconomic factors significantly influence childhood diarrhea incidence.
Abstract:
To determine risk factors for diarrhea, the authors followed an open cohort of 1,314 children from Guinea-Bissau by weekly diarrhea recall interviews between April 1987 and March 1990. Data on feeding practices and measles infection were available for all children and, for 531 children, comprehensive data on explanatory variables were recorded. Of 57 variables, seven were independently associated with an increased incidence of diarrhea. These were a recent (in the past 14 days) diarrheal episode, male sex, being weaned from breast milk, not being looked after by the mother, head of the household being < 30 years old, eating cold leftovers, and drinking water from an unprotected public water supply. In breastfed children, only three variables were associated with diarrhea, including prior diarrhea, male sex, and not being looked after by the mother. Among weaned children, six variables delineated increased rates of diarrhea, including unprotected public water supply, eating of cold leftovers, and lack of maternal education. Major determinants of persistent diarrhea included weaning, lack of maternal education, and having pigs in the home. It is concluded that, in addition to the promotion of breastfeeding, important interventions against diarrhea include improvements in water supply, hygiene, and food handling. However, because of effect modification by breastfeeding, the largest effects of these interventions will probably be among weaned children.