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Table 1 Risk factors for the alteration of spirometry indexes

From: Respiratory illness and air pollution from the steel industry: the case of Piquiá de Baixo, Brazil (Preliminary report)

  Years of residence in Piquiá Exposure to cigarette smoke Use of charcoal stoves Respiratory comorbidity
1–10 years >10 years
Male (M) 24 % 76 % 56 % 69 % 74 %
Female (F) 15 % 85 % 44 % 69 % 76 %