N. Gouveia et T. Fletcher, Respiratory diseases in children and outdoor air pollution in Sao Paulo, Brazil: a time series analysis, OCC ENVIR M, 57(7), 2000, pp. 477-483
Citations number
45
Categorie Soggetti
Envirnomentale Medicine & Public Health","Pharmacology & Toxicology
Objectives-To investigate the short term effects of air pollution on the re
spiratory morbidity of children living in Sao Paulo, Brazil, one of the lar
gest cities in the developing world.
Methods-Daily counts of hospital admissions due to respiratory diseases alo
ng with daily levels of meteorological variables and air pollutants (PM10,
SO2, NO2, O-3, and CO) were analysed with Poisson regression. Final models
were adjusted for the effects of time trends, seasonal patterns, weekdays,
holidays, meteorological factors, and serial correlation.
Results-Daily admissions of children to hospital for total respiratory dise
ase and pneumonia showed significant increases associated with O-3 (5-8%),
NO2 (9%), and with PM10 (9%) (results are for an increase from the 10th to
the 90th percentile of pollution measurements). Consistently, effects for p
neumonia were greater than for all respiratory diseases combined. Also, eff
ects on infants (children <1 year old) presented higher estimates. Similar
associations were found for asthma admissions. Point estimates for most pol
lutants were higher for asthma than for other diagnosed admissions. However
, these associations were not significant.
Conclusions-These results agree with the limited publications on this subje
ct but indicate a rather smaller magnitude of effects. Nevertheless, given
the present concentrations of air pollution in Sao Paulo and the large popu
lation potentially exposed attention should be directed to minimise such ef
fects.