title: [Acute effects of air pollution on health: evidence from epidemiological studies].
abstract: OBJECTIVE
  To summarize the evidence of acute health effects from exposure to particulate matter and ozone.
  
  
  METHODS
  A meta-analysis was performed using random effect models, to summarize the health effects of pollution, published in major international and Mexican journals up to June 2000.
  
  
  RESULTS
  Results were given as percent increase in ten units of PM10 (microgram/m3) and ozone (ppb). PM10 was found to have an effect on mortality (0.96%), hospital admissions (1.39%), emergency room visits (3.11%), respiratory symptoms (7.72%), pulmonary forced vital capacity (1.42%), and restricted activity days (7.74%). Ozone effects were equally significant.
  
  
  CONCLUSIONS
  These findings show the great impact that air pollutants may have on the health of populations living in large metropolis.
authors.affiliation: Dirección General de Salud Ambiental, Secretaría de Salud, México, D.F., México.
authors.forename: J A
authors.initials: JA
authors.lastname: Rosales-Castillo
authors.forename: V M
authors.initials: VM
authors.lastname: Torres-Meza
authors.forename: G
authors.initials: G
authors.lastname: Olaiz-Fernández
authors.forename: V H
authors.initials: VH
authors.lastname: Borja-Aburto
mesh_terms: D000368:Aged; D000393:Air Pollutants / Q000009:adverse effects*; D002648:Child; D004636:Emergency Service, Hospital; D006760:Hospitalization; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D008168:Lung / Q000502:physiology; D015201:Meta-Analysis as Topic; D008800:Mexico; D009017:Morbidity; D009026:Mortality; D010126:Ozone / Q000009:adverse effects*; D012129:Respiratory Function Tests
chemical_list: D000393:Air Pollutants; D010126:Ozone