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- W1547801321 abstract "Abstract The effects of urban residence on prevalence of respiratory symptoms and on pulmonary function in a population of white male nonsmokers are presented. Residence in urban areas of 50,000 + population in childhood was positively related to the PEFR; the effect at age 21 was estimated as approximately +26 liters/min. Residence in urban areas during adult life showed a significant nonlinear relationship to PEFR. Values increased during the first 7 years of urban residence as an adult, and then declined; this effect, at 30 years of urban residence after age 21, was estimated at −44 liters/min. No effect on the FEV 1.0 was found. Results for the prevalence of cough and phlegm are consistent with the results for the PEFR, but numbers were too small to allow definite conclusions to be drawn. The variance about the regressions was studied, and it was discovered that social class and urban residence affected the relationship of the variance about the regression to the age of the respondents." @default.
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- W1547801321 date "1971-10-01" @default.
- W1547801321 modified "2023-10-18" @default.
- W1547801321 title "Chronic respiratory disease among nonsmokers in Hagerstown, Maryland" @default.
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- W1547801321 doi "https://doi.org/10.1016/0013-9351(71)90029-6" @default.
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