International journal of epidemiology
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We explored methods to develop uncorrelated variables for epidemiological analysis models. They were used to examine associations between respiratory health outcomes and multiple household risk factors. ⋯ Our study suggests that independent respiratory effects of exposure to indoor air pollution, heating coal smoke, and ETS may exist for the studied children.
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Sulphur mustard (mustard gas), the most widely used chemical agent in the Iran-Iraq war, affects many organs including the skin, the gastrointestinal and respiratory tracts, and the central nervous system. The aim of this study was to assess the cumulative incidence rate and annual incidence rate of pulmonary complications, and the rate ratio of related factors. ⋯ The estimated risk of pulmonary complications from war exposure to mustard gas increased with age and for soldiers who had not worn masks.