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|Title: ||Biomass Fuel Use and the Risk of Asthma in Nigerian Children|
|Authors: ||Thacher, Jesse D.|
Madaki, Aboi J.K.
Thacher, Tom D.
|Keywords: ||Lung volume measurements|
Indoor air pollution
|Issue Date: ||20-Sep-2013|
|Publisher: ||Respiratory Medicine|
|Series/Report no.: ||Vol. 107;Iss. 12: Pp 1845-1851|
|Abstract: ||Background: Biomass fuel smoke exposure contributes to respiratory infections in childhood,
but its association with asthma has not been established. We studied the relationship of
biomass fuel use with asthma symptoms and lung function in Nigerian children.
Methods: A cross-sectional study was performed in 299 village children aged 5e11 years in
North Central Nigeria. Data were collected regarding the cooking fuels used and duration of
daily smoke exposure in the cooking area. Asthma symptoms were assessed with a modified International
Study of Asthma and Allergies in Childhood (ISAAC) questionnaire, and lung function
was assessed with spirometry.
Results: The prevalence of a lifetime history of wheeze was 9.4% (95% CI: 6.3%e13.2%). Fourteen
children (4.7%) had airway obstruction (FEV1/FEV6 <85%). Female subjects had lower
FEV1 and FEV6 (110 % and 120% percent predicted, respectively) than males (121% and 130%,
respectively, P <0.001 for both differences). Advancing age was associated with a relative
decline in the predicted value of FEV1 of 7.8 % per year (r Z 0.61; P < 0.001). Children in
families that used firewood daily did not have a significantly increased likelihood of asthmarelated
symptoms (OR Z 2.36, 95% CI: 0.66e8.44). Similarly, airway obstruction did not differ
significantly between children in households that did and did not use firewood daily (mean
FEV1/FEV6 of 0.95 and 0.97, respectively; P Z 0.41).
Conclusion: Reported smoke exposure was not associated with an increased risk of asthma
symptoms or airway obstruction. However, lifetime smoke exposure may explain the reduction
in spirometric values in female subjects and with advancing age.|
|Appears in Collections:||Family Medicine|
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