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Lung India Official publication of Indian Chest Society  
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Year : 1984  |  Volume : 2  |  Issue : 1  |  Page : 1-16

Prospective 3 Year Study Of Health Morbidity In Relation To Air Pollution In Bombay, India Methodology & Early Results Upto 2 Years



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S. R Kamat


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From a prospective survey on 4129 subjects in 3 urban (high, medium and low according to SO2 levels) areas and a rural community showed an initial prevalence of dyspnoea as 8.0, 5.9, 3.2 and 5.5 percent in the respective areas. For chronic cough the figures were 5.4, 3.0, 1.4 and 3.3 percent and for intermittent cough 15.6, 5.8, 0.4 and 3.7 percent respectively. Those having frequent colds (8+ per year) were 10.8, 19.9, 10.9 and 10.4 percent in these 4 areas. The initial prevalences for chronic bronchitis were 4.5, 4.5, 2.3 and 5.0 percent and cardiac diseases were 6.8, 4.3 8.2 and 2.7 percent respectively. For lung function, (MEFR and PEF 0.25-0.75) the 'urban low' area showed higher values; it showed a lower decline. Over 3 years, (between 1978-80) 53-60% of urban and 44% of rural subjects were reassessed. During this period, the rural area shows slightly higher morbidities and the 'urban low' area lowest rates. The 'urban medium' subjects showed higher frequency of frequent colds and intermittent cough. There were lower prevalences, for cough and dyspnoea only, in the 'urban low' and rural communities where there was larger greenery. There was significant relationship of NO2 with frequent colds, of cough with NO2 and SPM, and chronic cough and dyspnoea to all 3 pollutants. There was also suggestion of lower lung functions in normal subjects due to chronic effects of raised air pollutant levels. These trends need to be confirmed by further analysis.


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